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Enjoy PHPing AND ATHENA!
TABLE OF CONTENTS
Chapter 1. Web Design Basic .......................................................................................... 7
Web Design Toolbox ..................................................................................................... 9
HTML Editor – Dreamweaver CS3 .............................................................................. 16
HTML Basics ................................................................................................................ 22
HTML Form ................................................................................................................. 23
CSS .............................................................................................................................. 27
Javascript .................................................................................................................... 28
Chapter 2. PHP Workspace ........................................................................................... 31
PHP Introduction ........................................................................................................ 33
AppServ Installation ................................................................................................... 35
Using AppServ ............................................................................................................ 37
PHP IDE - PhpEd .......................................................................................................... 38
Using PHP Interactive ................................................................................................. 42
Chapter 3. PHP Basics ................................................................................................... 45
PHP Syntax .................................................................................................................. 47
Data Types .................................................................................................................. 48
Variable & Constant ................................................................................................... 49
Operators ................................................................................................................... 50
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Control Structure ........................................................................................................ 51
Chapter 4. Function ...................................................................................................... 55
Introduction ................................................................................................................ 57
Syntax ......................................................................................................................... 57
Parameter & Argument .............................................................................................. 58
Useful Functions ......................................................................................................... 61
Chapter 5. Array ........................................................................................................... 63
Declaration ................................................................................................................. 65
Array Operation .......................................................................................................... 65
Iteration (Looping) ...................................................................................................... 67
Sorting ........................................................................................................................ 68
More Functions .......................................................................................................... 70
Chapter 6. String Manipulation .................................................................................... 73
Declaration ................................................................................................................. 75
Comparision ............................................................................................................... 75
Searching .................................................................................................................... 76
Replacement............................................................................................................... 76
Splitting ....................................................................................................................... 77
Formatting .................................................................................................................. 78
Regular Expression – RegEx ........................................................................................ 79
Chapter 7. HTTP Basic ................................................................................................... 83
HTTP Fundamentals.................................................................................................... 85
File Upload .................................................................................................................. 88
Cookie ......................................................................................................................... 90
Session ........................................................................................................................ 91
Chapter 8. OOP – Object Oriented Programming ......................................................... 93
OOP Fundamentals ..................................................................................................... 95
Properties ................................................................................................................... 96
Methods ..................................................................................................................... 97
Inheritance & Overriding .......................................................................................... 101
Chapter 9. File Handling ............................................................................................. 107
File Handle ................................................................................................................ 109
File Manipulation...................................................................................................... 110
Directory ................................................................................................................... 112
File & Directory Constants ........................................................................................ 113
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Chapter 10. MySQL ..................................................................................................... 115
DBMS Fundamentals ................................................................................................ 117
MySQL Fundamentals ............................................................................................... 118
MySQL Basics ............................................................................................................ 122
Using phpMyAdmin .................................................................................................. 125
MySQL in PHP ........................................................................................................... 138
Chapter 11. Logging & Debugging .............................................................................. 141
Log Configuration ..................................................................................................... 143
PhpEd Debugger Installation .................................................................................... 143
Debugging ................................................................................................................. 145
Chapter 12. OOP Advanced ........................................................................................ 149
Interface ................................................................................................................... 151
Abstract Class, Method ............................................................................................ 152
Final Class, Method .................................................................................................. 153
Lazy Loading ............................................................................................................. 154
Magic Methods ......................................................................................................... 154
Chapter 13. MySQL Advanced .................................................................................... 159
Table Joining ............................................................................................................. 161
PHP Data Object (PDO) ............................................................................................. 164
Chapter 14. Software Engineering Basic ..................................................................... 167
Requirement Gathering ............................................................................................ 169
Use-Case Diagram .................................................................................................... 171
Class Diagram ........................................................................................................... 177
Chapter 15. XML & Web Service ................................................................................. 181
XML Basics ................................................................................................................ 183
SimpleXML Class ....................................................................................................... 184
Web Services Basics.................................................................................................. 185
SOAP ......................................................................................................................... 186
JSON Overview ......................................................................................................... 189
Chapter 16. Security ................................................................................................... 191
Security Basics .......................................................................................................... 193
Database Security ..................................................................................................... 193
Website Security....................................................................................................... 194
Session Security ........................................................................................................ 199
File System Security .................................................................................................. 201
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Chapter 17. Advanced PHP Topics .............................................................................. 203
PHP.INI File Overview ............................................................................................... 205
Date & Time .............................................................................................................. 206
Email Sending ........................................................................................................... 208
Image Processing ...................................................................................................... 209
cURL library .............................................................................................................. 210
Smarty ...................................................................................................................... 211
Different between PHP5 & PHP4 ............................................................................. 212
Chapter 18. Design Pattern ........................................................................................ 215
Fundamentals ........................................................................................................... 217
Singleton Pattern ...................................................................................................... 217
Factory Pattern ......................................................................................................... 218
Strategy Pattern ....................................................................................................... 220
Model-View-Controller (MVC) Pattern .................................................................... 221
Chapter 19. E-Commerce Website .............................................................................. 225
E-Commerce Fundamentals ..................................................................................... 227
Website Optimization............................................................................................... 228
SEO Basics ................................................................................................................. 228
Website Analytic – Google Analytic Setup ............................................................... 230
Chapter 20. Zend PHP 5 Certification – ZCE (Zend Certified Engineer) ........................ 243
Zend Certification Introduction ................................................................................ 245
Zend PHP 5 Certification Exam ................................................................................. 246
Further Reading.......................................................................................................... 249
UseFul Websites ......................................................................................................... 250
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Chapter 1
Web Design
Basics Keywords: Web design, editor, tool, photo, form, html, tag, style,
javascript.
Subjects:
1.1. Web Design Toolbox
1.2. HTML Editor – Dreamweaver CS3
1.3. HTML Basics
1.4. HTML Form
1.5. CSS
1.6. Javascript
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1.1. Web Design Toolbox:
1.1.1. Image Manipulating: Photoshop, GIMP, Illustrator…
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1.1.2. Animation Creator: Photoshop, Flash, Flex, Maya, 3DS Max…
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1.1.3. HTML Editor: Dreamweaver, Notepad++…
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1.1.4. CSS Editor: Dreamweaver, Rapid CSS, Notepad++…
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1.1.5. Javascript Editor: Dreamweaver, 1st Javascript Editor, Notepad++…
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1.2. HTML Editor – Dreamweaver CS3:
- Main Dreamweaver CS3 interface
- Auto-complete function
- Collapse selected script:
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- Property Inspector Panel:
- Create a Local Site:
Or:
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Or:
- After creating site, the FILES panel will become:
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- Open an Local Site:
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- Manage Site Files: In the Files Panel, right click the root (top level) and select your function (New File, New Folder…)
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- Create new file
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1.3. HTML Basics:
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1.3.1. HTML Structure:
<html>
<head>
<title>Four Square Cafe</title>
</head>
<body>
Four Square Café is located at the intersection of Melrose and Sunset Avenues in Los
Angeles. We are a cafe with our own bakery, and also have a charcuterie for your favorite
meats and cheeses. We offer breakfasts and made to order sandwiches. You can buy fresh,
hot from the oven bread for your home twice a day, at 8 am and 5 am daily. In our Café,
we are also famous for fresh organic coffee and tea made with mountain water. Each cup
is in its own single cone and paper filter and dripped right into your cup. We then start
over for the next customer.
Today's Specials
....................content deleted ..............................
</body>
</html>
1.3.2. Popular HTML Tag:
- Break line: br
- Heading: h1, h2, h3, h4, h5, h6.
- Paragraph: p
- Link: a
- Image: img
- Text formatting: b, i, strong
- Tables: table, tr, th, td
- List: ul, ol, dl, li
- Form: form, input, textarea, select
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- DIV, SPAN Tag: div, span
1.3.3. HTML Meta Tag:
<meta name="description" content="Free Web tutorial s" /> <meta name="keywords" content="HTML,CSS,XML,JavaScr ipt" /> <meta name="author" content="Duy Tuan" />
<meta http-equiv="refresh" content="4;URL=http://ex ample.com/"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
1.4. HTML Form:
1.4.1. Using Dreamweaver to insert Form element:
1.4.2. Form Elements:
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1.4.2.1. Text Field:
<form method="post" action="mailto:youremail@email. com"> Name: <input type="text" size="10" maxlength="40" n ame="name">
<br /> Password: <input type="password" size="10" maxlengt h="10"
name="password"> </form>
1.4.2.2. Button:
<form method="post" action="mailto:youremail@email. com"> Name: <input type="text" size="10" maxlength="40" n ame="name">
<br /> Password: <input type="password" size="10" maxlength="10" name="password"><br />
<input type="submit" value="Send"> </form>
1.4.2.3. Radio button:
<form method="post" action="mailto:youremail@email. com"> What kind of shirt are you wearing? <br /> Shade:
<input type="radio" name="shade" value="dark">Dark <input type="radio" name="shade" value="light">Ligh t <br /> Size:
<input type="radio" name="size" value="small">Small <input type="radio" name="size" value="medium">Medi um <input type="radio" name="size" value="large">Large <br /> <input type="submit" value="Email Myself">
</form>
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1.4.2.4. Check box:
<form method="post" action="mailto:youremail@email. com"> Select your favorite cartoon characters.
<input type="checkbox" name="toon" value="Goofy">Go ofy <input type="checkbox" name="toon" value="Donald">D onald <input type="checkbox" name="toon" value="Bugs">Bug s Bunny <input type="checkbox" name="toon" value="Scoob">Sc ooby Doo <input type="submit" value="Email Myself">
</form>
1.4.2.5. Dropdown list:
<form method="post" action="mailto:youremail@email. com"> College Degree?
<select name="degree"> <option>Choose One</option> <option>Some High School</option> <option>High School Degree</option> <option>Some College</option> <option>Bachelor's Degree</option> <option>Doctorate</option>
</select> <input type="submit" value="Email Yourself">
</form>
1.4.2.6. Selection form:
<form method="post" action="mailto:youremail@email. com"> Musical Taste
<select multiple name="music" size="4"> <option value="emo" selected>Emo</option> <option value="metal/rock" >Metal/Rock</option> <option value="hiphop" >Hip Hop</option>
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<option value="ska" >Ska</option> <option value="jazz" >Jazz</option> <option value="country" >Country</option> <option value="classical" >Classical</option> <option value="alternative" >Alternative</option> <option value="oldies" >Oldies</option> <option value="techno" >Techno</option>
</select> <input type="submit" value="Email Yourself">
</form>
1.4.2.7. Upload form:
<input type="hidden" name="MAX_FILE_SIZE" value="10 0" /> <input name="file" type="file" />
1.4.2.8. Text Area:
<form method="post" action="mailto:youremail@email. com"> <textarea rows="5" cols="20" name="comments"> Enter Comments Here </textarea> <input type="submit" value="Email Yourself"> </form>
1.5. CSS:
1.5.1. CSS Selector:
- The selector name creates a direct relationship with the HTML tag you want to edit.
- Many types of selector: type, class, id, child, universal…
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- Ex: <div id=" container" class=" bluebox largebox">…</div>
1.5.2. CSS Syntax:
SELECTOR { PROPERTY: VALUE }
1.5.3. Embed CSS to HTML page:
- Internal CSS:
<style type="text/css"> p {color: white; } body {background-color: black; } </style>
- External CSS:
<link rel="stylesheet" type="text/css" href="test.c ss" />
- Inline CSS:
<p style="background: blue; color: white;"> Text </p>
1.6. Javascript:
1.6.1. Embed Javascript to HTML page:
- Internal:
<script type="text/javascript"> //script here </script>
- External:
<script type="text/javascript" src="file.js"></scri pt>
- Inline:
<img src="button.gif" onclick="alert('test');" />
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1.6.2. Javascript Basics:
1.6.2.1. Comments:
// this is a comment /* so is this */
1.6.2.2. Function:
function anExample(param1,param2) { alert(param1+param2); } <a href="javascript:void(0)" onClick="anExample("Ec ","Lios") >
Example </a>
1.6.2.3. IF Statement:
function anIfExample(param) { if (param==1) {alert("Hello Philip");} else if (param==2) {alert("Hello Terrance");} else {alert("Hello everyone");} } <a href="javascript:void(0)" onClick="anIfExample(1 )" > Example
1</a> <br> <a href="javascript:void(0)" onClick="anIfExample(1 )" > Example
2</a> <br> <a href="javascript:void(0)" onClick="anIfExample(2 )" > Example
3</a>
1.6.2.4. SWITCH Statement:
function aSwitchExample(param) { switch(param) { case 1: alert("Hello John"); break; case 2: alert("Hello Peter"); case 3: alert("Hello Moose"); break;
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default: alert("ahhh no moosi"); break; } } <a href="javascript:void(0)" onClick="aSwitchExampl e(1)" > Example
1</a> <br> <a href="javascript:void(0)" onClick="aSwitchExampl e(1)" > Example
2</a> <br> <a href="javascript:void(0)" onClick="aSwitchExampl e(2)" > Example
3</a>
1.6.2.5. WHILE Statement:
function aWhileExample(param) { counter=0; while(counter<param) { alert("round we go " + counter); counter++; // this adds one to the counter, could have typ ed // counter=counter+1; } } <a href="javascript:void(0)" onClick="aWhileExample (0)" > Example
1</a> <br> <a href="javascript:void(0)" onClick="aWhileExample (1)" > Example
2</a> <br> <a href="javascript:void(0)" onClick="aWhileExample (3)" > Example
3</a>
1.6.2.6. DO Statement:
function aDoExample(param) { counter=0; do { alert("round we go " + counter); counter++; // this adds one to the counter, could have typ ed // counter=counter+1; } while (counter<param) } <a href="javascript:void(0)" onClick="aDoExample(0) " > Example
1</a> <br> <a href="javascript:void(0)" onClick="aDoExample(1) " > Example
2</a> <br>
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<a href="javascript:void(0)" onClick="aDoExample(3) " > Example 3</a>
1.6.2.7. FOR Statement:
function aForExample(param) { for(counter=0; counter<param; counter++) { alert("round we go " + counter); } } <a href="javascript:void(0)" onClick="aForExample(0 )" > Example
1</a> <br> <a href="javascript:void(0)" onClick="aForExample(1 )" > Example
2</a> <br> <a href="javascript:void(0)" onClick="aForExample(3 )" > Example
3</a>
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Chapter 2
PHP
Workspace Keywords: installation, IDE, server-side, scripting, interpreter,
opensource, CLI, service, GUI, code navigator, DB Client, php interactive, request, response.
Subjects:
2.1. PHP Introduction
2.2. AppServ Installation
2.3. Using AppServ
2.4. PHP IDE - PhpEd
2.5. Using PHP Interactive
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2.1. PHP Introduction:
- How PHP Works:
- PHP stands for "PHP Hypertext Preprocessor" - PHP is a widely used open source. Stable version is PHP 5.3.0 (PHP6 beta) - Runs on Server -> Server-Side Scripting language - It's fast, free, easy to use, run on many Operating Systems(OS), secure, customizable, support
community. - PHP supports many database (MySQL, Oracle, Sybase, PostgreSQL…) - File extension: ".php", ".php3", ".php5" or ".phtml"
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interacting via browser
Working via CLI (command-line interface)
Working via GUI(Graphical User Interface) – Desktop Application
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Working via web services (no need interface)
2.2. AppServ Installation:
- It will install Apache, PHP, MySQL in one window executive file (.exe) - Best solution for creating an environment to learning, developing and testing website. - Download AppServ at: http://www.appservnetwork.com/ - Install like a normal window application.
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2.3. Using AppServ:
2.3.1. AppServ 2.10 Directory Structure:
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2.3.2. Edit Server config using start menu:
2.3.3. Restart/ Stop / Start Apache / MySQL Services using start menu:
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2.4. PHP IDE - PhpEd
- Main Software interface:
+ Menu Bar
+ Toolbar (File, navigator, HTML element, Debugger…)
+ Code Explorer Panel (Left)
+ Source code editor (Center)
+ Code navigator Panel (Rignt)
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- Some main features:
+ Autocomplete code:
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+ Full screen support
+ Database Client
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+ Support HTML, CSS, JS language
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+ Debuging & Profiling tool
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+ Collapse / Expand Selected code.
2.5. Using PHP Interactive
2.5.1. Introduction:
PHP Interactive is a simple PHP program that lets the user to write code in a text area (actually multiple text areas, with tabs to switch), and see the output of the code just pressing the update button. The scripts are persistent, and the program supports a raw and html output mode, in order to see the raw script output or to interpret it as html.
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2.5.2. Installation:
- Download at: http://www.hping.org/phpinteractive/
- Unzip and copy to www folder and rename to "phpa".
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- Access php interactive using URL: http://localhost/phpa/
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Chapter 3
PHP Basics Keywords: syntax, data type, variable, constant, type casting, operator,
control structure, condition, loop, precidence, priority, expression.
Subjects:
3.1. PHP Syntax
3.2. Data Types
3.3. Variable & Constant
3.4. Operators
3.5. Control Structure
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3.1. PHP Syntax:
3.1.1. PHP Tags:
- PHP code can be inserted directly into a text file (.php…). The interpreter will output any text outside the tags, and execute the code that is between the tags
3.1.2. PHP Source code:
- Every PHP script is made up of statements: function calls, variable assignments, data output…Most of the time, these statements must be terminatd with a semicolon(;). PHP is whitespace-intensitive.
3.1.3. Comments:
- PHP has many types of comment
//Single line comment #Single line comment /* Multi-line comment */ /** * API Documentation Example * * @param string $bar
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*/ Function foo($bar){}
<?php //this is the end tag "?>" of PHP ?>
3.1.4. Code Block: is a series of statements enclosed between two braces
{ //Some comments f(); //a function call
}
3.2. Data Types:
3.2.1. Numeric Value:
- Integer numbers:
. Decimal: normally used numbers. Ex: 10; -100… (invalid: 1 000 )
. Octal: begin with zero. Ex: 0666; 0777 …
. Hexadecimal: Begin with "0x " or "0X". Ex: 0x12; 0xAF; 0XFF …
- Floating-point numbers: have a fractional component.
. Decimal: 0.12; 3.45 …
. Exponential: 4E6; 1e2 …
3.2.2. String: A series of single characters, such as Vietnam .
3.2.3. Boolean: A TRUE or FALSE value.
3.2.4. Array: can store any other data type.
3.2.5. Object: containers of both data and code.
3.2.6. Other types:
- NULL : indicates that a variable has no value.
- resource : used to indicate external resources. Such as handing files, manipulating images
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3.2.7.Type casting: can be done automatically or manually.
Ex: $a = 1.5; $b = (int)$a; // $b will be assigned 1
3.3. Variable & Constant:
3.3.1. Variables:
- Can contain any type of data, such as strings, integers, objects, arrays…PHP is loosely typed.
- Identified by a dollar sign $
- Variable name must be using only letters (a-z, A-Z), numbers and the underscore character "_".
- Variable name must start with a letter or an underscore
- Case-sensitive.
- Examples:
$var = "ok"; // Valid name $_var = "ok"; // Valid name $4var = "not ok"; //Invalid name, starts with a num ber
3.3.2. Variable Variables:
- Variable whose name is contained in another variable. Example:
$var = 'name'; $$var = 'I love php'; echo $name; // Displays 'I love php'
3.3.3. Constants:
- Can be accessed for any scope within a script
- They can only contain numeric values, strings and booleans.
- Naming like rule of variable name, but not start with dollar sign $
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- It's usually defined constants using only upper-case names.
- Examples:
define('EMAIL', '[email protected]'); echo EMAIL; // Displays '[email protected]' define('5CLASS, 'some value); // Invalid name
3.4. Operators:
3.4.1. Assignment Operator: assigning data to variables. Ex:
$a = 1; // Assign the integer 1 to $a
3.4.2. Arithmetic Operators: performing basic math functions. Ex:
$a = 5 + 6; $b = $a – 1;
3.4.3. String Operators: joining two or more strings. Ex:
$myString = 'hello' . '-' . 'world'; // $myString will be string 'hello-world'
3.4.4. Comparison Operators: comparing two pieces of data. Ex:
$a = 10; echo $a == 10; // outputs 1
3.4.5. Logical Operators: performing logical operations on Boolean values.
$a = false; echo !$a; //outputs 1
3.4.6. Bitwise Operators: manipulating bits using boolean math. Ex:
$x = 1; echo $x << 1; // Outputs 2; echo $x << 2; // Outputs 4;
3.4.7. Error Control Operators: Suppressing errors. Prepending @ to an expression, this operator causes PHP to ignore almost all error messages that occur that expression is being evaluated. Ex:
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$x = @mysql_connect();
3.4.8. Execution Operators: executing system commands. Backtick operator (` ) makes it possible to execute a shell command and retrieve its output. Ex:
echo `dir c:\\`; // outputs info like open command window, type "dir c:\"
3.4.9. Incrementing/Decrementing Operators: incrementing and decrementing numerical values. Ex:
$a = 1; echo $a++; // Outputs 1, $a is now equal to 2 echo ++$a; //Outputs 3, $a is now equal to 3
3.4.10. Type Operators: instanceof operator is used to determine whether a PHP variable is an instantiated object of a certain class. Ex:
echo $a instanceof MyClass;
3.4.11. Operator Precedence and Associativity:
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3.5. Control Structure:
3.5.1. Conditional Structures:
3.5.1.1. If…Else Statement:
if (condition_1) { statement_1 } [elseif (condition_2) { statement_2 }] ... [elseif (condition_n_1) { statement_n_1 }] [else {
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statement_n }]
3.5.1.2. Switch Statement:
switch (expression) { case label_1: statements_1 [break;] case label_2: statements_2 [break;] ... default: statements_n [break;] }
3.5.2. Loop Structures:
3.5.2.1. While Loop:
while (condition) { code to be executed; }
3.5.2.2. Do…While Loop:
do { code to be exected; } while (condition);
3.5.2.3. For Loop:
for (initialization; condition; increment) {
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code to be executed; }
3.5.2.4. Foreach Loop:
foreach (array as value) { code to be executed; } foreach (array as key => value) { code to be executed; }
3.5.3. Break & Continue Statements
3.5.3.1. break: used to immediately exit a loop. It takes an optional parameter, which allows you to exit from multiple nested loops. Ex:
$i = 0; $j = 0; while ($i < 10) { while ($j < 10) { if ($j == 5) {break 2;} // breaks out of two wh ile loops $j++; } $i++; }
3.5.3.2. continue: want to skip over the remainder of an iteration and immediately skip over to the next. Like with break, you can provide it an integer parameter to specify the level of nesting to which the it applies. Ex:
for ($i=0; $i<=10; $i++) { if (i==3){continue;} echo "The number is ".$i; echo "<br />"; }
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Chapter Exercise:
A> Research typing casting on resource data type.
B> What is the function used to check a declared variable? Is it always true in all situations?
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Chapter 4
Functions Keywords: function, parameter, argument, reference, value, global,
static, scope, return, null, empty, language construct.
Subjects:
4.1. Introduction
4.2. Syntax
4.3. Parameter & Argument
4.4. Useful Functions
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4.1. Introduction:
- Function is the heart of PHP programming.
- Encapsulate any piece of code in a way that it can be called again and again.
- Classify between Language constructs and Functions.
• Fastest things in PHP are the language constructs. • They are highly optimized in the interpreter • Don’t require calling external libraries • Don’t call a function if there is a language construct. As an example, using a
casting operator like (int) $total is much more efficient than using the function intval($foo)
• Function calling generate considerably amount of overhead. Using a language construct avoid
• isset() and unset() are both language constructs, even though they mostly act like functions. However calling them does not generate the function overhead.
• Common language construct: � echo() � empty() � isset() � unset() � eval() � exit() � die() � include() � include_once() � require() � require_once() � return
4.2. Syntax:
4.2.1. Create function: function name is case-intensitive.
function name() { //your code here }
Ex: function hello() {
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echo 'Hello World'; } hello(); // Displays "Hello World"; HeLLo(); // Displays "Hello World";
4.2.2. Return values:
- All functions in PHP return a value (event if you don't using return keyword, it will return NULL)
- return keyword allows you to interrupt the execution of a function and exit it.
- Ex:
function hello() { return 'Hello World'; } $str = hello(); // Assigns return value "Hello Worl d" to $str echo hello(); // Displays "Hello World"
- Functions can be declared so that they return by reference, usually resource type. Ex:
function &query() { $result = mysql_query('SELECT email FROM users'); return $result; }
4.3. Parameter & Argument:
4.3.1. Different between Parameter and Argument:
- The term parameter refers to any declaration within the parentheses following the function name in a function declaration or definition; the term argument refers to any expression within the parentheses of a function call.
- This example demonstrates the difference between a parameter and an argument:
// $var is a parameter function test($var) {
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foo(5, 'a'); //5 and 'a' are arguments return 0; }
4.3.2. Passing by value: by default, function arguments are passed by value (so that if the value of the argument within the function is changed, it does not get changed outside of the function). Ex:
function myFunc($str) { $str = 'bob'; echo $str; } $str = 'jack'; myFunc($str); // Displays "bob" echo $str; // Displays 'jack'
4.3.3. Passing by reference: to allow function to modify its arguments, they must be passed by reference.Ex:
function myFunc(&$str) { $str = 'bob'; echo $str; } $str = 'jack'; myFunc($str); // Displays "bob" echo $str; // Displays 'bob
4.3.4. Default argument values: Set default value for an argument if it's not passed to function. Ex:
function myFunc($str = 'mother') { echo $str; } $str = 'jack'; myFunc($str); // Displays "jack" myFunc(); // Displays "mother"
Question: What will output when running this script?
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function myFunc(&$str = 'mother') { // } $str = 'jack'; myFunc($str); echo $str;
4.3.5. Variable Scope: is the context within which it is defined. Most part all PHP variables only have a single scope. View this script:
$a = 1; /* global scope */ function test() { echo $a; /* reference to local scope variable * / } test(); // Not display "1"
4.3.5.1. Using global scope variables:
- Using global keyword. Ex:
$a = 1;
$b = 2;
function Sum()
{
global $a, $b;
$b = $a + $b;
}
Sum();
echo $b; // Display "3"
- Using $GLOBALS variable. Ex:
$a = 1; $b = 2; function Sum() { $GLOBALS['b'] = $GLOBALS['a'] + $GLOBALS['b']; }
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Sum(); echo $b; // Display "3"
4.3.6. Static variables: A static variable exists only in a local function scope, but it does not lose its value when program execution leaves this scope.
- Ex1: function test()
{ $a = 0; echo $a; $a++; }
test(); // Display "0"; test(); // Display "0";
- Ex2: function test()
{ static $a = 0; echo $a; $a++; }
test(); // Display "0"; test(); // Display "1";
- Note: static variable must not be declared as the result of an expression, it will cause a parse error. Ex:
static $var = 1+2; // wrong (as it is an expressio n) static $var = sqrt(2); //wrong (as it is an expres sion)
4.4. Useful Functions:
4.4.1. func_num_args(): returns the number of arguments passed to the function.
4.4.2. func_get_arg(int $index): returns an item from the argument list.
4.4.3. func_get_args(): returns an array comprising a function's argument list.
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4.4.4. function_exists(string $function_name): return TRUE if the given function has been defined.
Chapter Exercise:
A> Write a script to calculate and return the sum of all arguments (the number of argument is unknown) of a function.
Example: $a = calculate(1,2,3,4,6,2); // $a = 18 B> List 3 global scope variables beside $GLOBALS
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Chapter 5
Array Keywords: array, element, index, key, value, associate, sort, shuffle,
random, iteration, loop, stack, queue, pop, push, shift.
Subjects:
5.1. Declaration
5.2. Array Operation
5.3. Iteration (Looping)
5.4. Sorting
5.5. More Functions
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5.1. Declaration:
5.1.1. Declare an array variable:
$a = array(10, 20, 30); $a = array('a' => 10, 'b' => 20, 'key' => 30); $a = array(5 => 1, 3=> 2, 1=>3, ); $a = array();
5.1.2. Array operator []:
$a[] = 10; $a['key'] = 'value'; echo $a['key']; // Displays "value"
5.1.3. Multi-dimension Arrays: element of an array is an array too. Ex:
$a = array( array('red', 'green', 'blue'), array('small', 'medium', 'large') );
5.2. Array Operation:
5.2.1. Printing array:
- Using print_r() to print only one array. Ex:
$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z')); print_r($a); // Outputs: Array ( [a] => apple [b] => banana [c] => Array ( [0] => x [1] => y [2] => z ) )
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- Using var_dump() can print more than one array.
$a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x', 'y', 'z')); $b = array('x', 'y'); var_dump($a, $b); // Outputs: array(3) { ["a"]=> string(5) "apple" ["b"]=> string(6) "banana" ["c"]=> array(3) { [0]=> string(1) "x" [1]=> string(1) "y" [2]=> string(1) "z" } } array(2) { [0]=> string(1) "x" [1]=> string(1) "y" }
5.2.2. Counting array elements: using count() function. Ex:
$a = array(5,6,7); $element = count($a); // $element will be 3
5.2.3. Checking a variable is an array: using is_array() function. Ex:
$a = array(5,6,7); $result = is_array($a); var_dump($result); // Displays "bool(true)"
5.2.4. Checking an element exists: using isset() function.
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- Note: if element value equal NULL, isset() still return FALSE. Ex:
$a = array('a' => NULL, 'b' => 2); $test = isset($a['a']); // $test will be assigned FALSE
In this case, using array_key_exists() function. Ex:
$a = array('a' => NULL, 'b' => 2); $test = array_key_exists('a', $a); // $test will b e TRUE
5.2.5. Deleting an element: using unset() function. Ex:
$a = array('a', 'b', 'c'); unset($a[1]); print_r($a); // Outputs: Array ( [0] => a [2] => c )
5.3. Iteration (Looping):
5.3.1. Array Pointer: using key(), current(), next(), prev(), reset(), end() function. Ex:
$a = array('a', 'b', 'c'); while(key($a) !== null) { echo key($a) . ': ' . current($a) . PHP_EOL; // Move pointer to next element next($a); } // Outputs: 0: a 1: b 2: c
� It's not a common way for iteration array.
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5.3.2. Using for() and foreach() function:
- Ex 1:
$a = array(3, 5, 7); $iCount = count($a); for($i = 0; $i < $iCount; $i++) { echo $a[$i] . '.'; } // Displays "3, 5, 7, "
- Ex 2:
$a = array('blue' => 'small', 'green' => 'large'); foreach($a as $key => $value) { echo $key. ' : ' . $value . ','; } //Displays "blue : small, green : large, "
5.4. Sorting:
Function name Sorts by Maintains key association
Order of sort Related functions
sort() Value No Low to high rsort() rsort() Value No High to low sort() asort() Value Yes Low to high arsort() arsort() Value Yes High to low asort() natsort() Value Yes Natural natcasesort() natcasesort() Value Yes Natural, case
insensitive natsort()
ksort() Key Yes Low to high asort() krsort() Key Yes High to low ksort()
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usort() Value No User defined uasort() uasort() Value Yes User defined uksort() uksort() Key Yes User defined uasort() shuffle() Value No Random array_rand() array_multisort() Value Associative
yes, numeric no
First array or sort options
array_walk()
Example of using sort() function:
$fruits = array( 'a' => 'lemon', 'c' => 'orange', 'd' => 'banana', 'b' => 'apple');
sort($fruits); foreach ($fruits as $key => $val) { echo "fruits[" . $key . "] = " . $val . "\n"; } // Outputs: fruits[0] = apple fruits[1] = banana fruits[2] = lemon fruits[3] = orange
Example of using asort(): $fruits = array( 'a' => 'lemon', 'c' => 'orange', 'd' => 'banana', 'b' => 'apple'); asort($fruits); foreach ($fruits as $key => $val) { echo "fruits[" . $key . "] = " . $val . "\n"; } // Outputs: fruits[b] = apple fruits[d] = banana fruits[a] = lemon fruits[c] = orange
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Example of using ksort() : $fruits = array( 'a' => 'lemon', 'c' => 'orange', 'd' => 'banana', 'b' => 'apple'); ksort($fruits); foreach ($fruits as $key => $val) { echo "fruits[" . $key . "] = " . $val . "\n"; } // Outputs: fruits[a] = lemon fruits[b] = apple fruits[c] = orange fruits[d] = banana
5.5. More Functions:
5.5.1. list() : assign variables as if they were an array.
5.5.2. array _merge() : merge one or more arrays.
5.5.3. array_slice() : extract a slice of the array.
5.5.4. array_diff_*() group: computes the difference of arrays
5.5.5. array_intersect_*() group: computes the intersection of arrays.
5.5.6. array_push(), array_pop(), array_shift(), array_uns hift() : insert/ remove an element from array using queue and stack operation.
STACK OPERATION
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QUEUE OPERATION
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Chapter Exercise:
A> Can we use arithmetic operator (+, -, *, /) between 2 arrays. If yes, what is the result? B> Simulate the game "ðánh bài Tiến lên" of Vietnamese, there are 4 people in game, each
has 13 cards. Using functions from beginning to this chapter to write the action of shuffle cards and give each one 13 random cards.
***** difficult : write the function to find the number of "3 ñôi thông" in 13 cards of each person.
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Chapter 6
String
Manipulation Keywords: string, haystack, needle, text, character, case-sensitive, case-
insensitive, HEREDOC, escape character, compare, search, extract, replace, position, format, regular expression, expression, match, pattern, delimiter, PCRE, overhead.
Subjects:
6.1. Declaration
6.2. Comparision
6.3. Searching
6.4. Replacement
6.5. Splitting
6.6. Formatting
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6.7. Regular Expression – RegEx
6.1. Declaration:
6.1.1. Normal Assignment:
1. $a = "Using double quote"; 2. $b = 'Using single quote'; 3. $c = "control characters in \n double quote only"; 4. $c2 = "\052"; 5. $c3 = "\x2a"; 6. $num = 1; 7. $d = "$num is parsed"; // $d equals "1 is parsed" 8. $e = "$numx is not parsed"; // $e equals " is not parsed" 9. $f = "{$num}x is parsed"; // $f equals "1x is pars ed"
6.1.2. HEREDOC:
$who = "World"; $str = <<<TEXT Hello $who TEXT; // Displays "Hello World"
6.2. Comparision:
6.2.1. Comparison Operator : using operators == , !=, ===, !== . Ex:
$a = '123abc'; $b = '123Abc'; $c = 123; $test1 = ($a == $b); // $test1 equals FALSE $test2 = ($a == $c); // $test2 equals TRUE $test3 = ($a === $c); // $test3 equals FALSE
6.2.2. Using strcmp() : compare two string, it's case-sensitive. Using strcasecmp() to compare two string, it's case-insensitive.
Ex:
$str = 'Hello world';
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$test1 = strcmp($str, 'hello world'); // $test1 eq uals -1 $test2 = strcasecmp($str, 'hello world'); // $test 2 equals 0 $test3 = strcmp('a', 'A'); // $test3 equals 1;
6.3. Searching:
6.3.1. strpos() : Find position of first occurrence of a string. It's case-sensitive.
- Ex:
$pos = strpos('mystring', 'str'); // $pos equals 2 $pos = strpos('mystring', 'hi'); // $pos === FALSE
6.3.2. strrpos() : Find position of last occurrence of a char in a string. It's case-sensitive.
Ex:
$pos = strrpos('mystringmy', 'my'); // $pos equals 8
6.3.3. strstr() : Find first occurrence of a string. It's case-sensitive.
Ex:
$pos = strstr('mystring', 'str'); // $pos equals "s tring" $pos = strstr('mystring', 'hi'); // $pos === FALSE
6.3.4. stripos() is the case-insensitive version of strpos() .
6.3.5. strripos() is the case-insensitive version of strrpos() .
6.3.6. stristr() is the case-insensitive version of strstr() .
6.4. Replacement:
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6.4.1. str_replace() : replace all occurrences of the search string with the replacement
string, it's case-sensitive. str_ireplace() is the case-insensitive of str_replace() . Ex:
echo str_replace('abc', 'z', 'abcdef' ); //Display s "zdef" echo str_replace('ABC', 'z', 'abcdef'); // Displa ys "abcdef" echo str_ireplace('ABC', 'z', 'abcdef'); // Displa y "zdef"
6.4.2. substr_replace() : replace text within a portion of a string.
Ex:
echo substr_replace('012345abcdef', 'zzz', 5); // Displays "01234zzz"
6.5. Splitting:
6.5.1. Retun part of string: using substr() .
Ex:
echo substr('abcdef', 1); // bcdef echo substr('abcdef', 1, 3); // bcd echo substr('abcdef', 0, 4); // abcd echo substr('abcdef', 0, 8); // abcdef echo substr('abcdef', -1, 1); // f
6.5.2. Split string to array: using explode() and split() function.
Ex:
$s1 = 'a,b,c,d'; $a1 = explode(',', $s1); print_r($a1); $s2 = '1,2,3,4'; $a2 = split(',', $s2, 2); print_r($a2); //Displays: Array (
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[0] => a [1] => b [2] => c [3] => d ) Array ( [0] => 1 [1] => 2,3,4 )
Question: what displays when running this script:
echo count(split('/', '///'));
6.5.3. Join array elements to a string: using implode() and join() function.
Ex:
$array = array('lastname', 'email', 'phone'); $comma_separated = implode(",", $array); echo $comma_separated;
// displays "lastname,email,phone"
6.6. Formatting:
6.6.1. Number formatting: using number_format() to formatting numerical value.
Ex:
echo number_format("100000.123", 2, '.', ','); // Displays "100,000.12"
6.6.2. Output formatting: using printf() to print a string in a specified format.
Ex:
- %s, %d, %f: Specifiers.
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Specifier Format b The argument is treated as an integer and is presented as an integer in binary
form. c The argument is treated as an integer and is presented as the ASCII character
for that value. d The argument is treated as an integer and presented as a signed integer. u The argument is treated as an integer and presented as an unsigned integer. f The argument is treated as a floating-point number and presented as a
floating-point number. o The argument is treated as an integer and presented as its octal
representation. x The argument is treated as an integer and presented as a hexadecimal
number (using lowercase letters). X The argument is treated as an integer and presented as a hexadecimal
number (using uppercase letters).
- Formatting functions:
Function Arguments Result printf Format, args Writes output sprintf Format, args Return result vprintf Format, array of args Writes output vsprintf Format, array of args Returns result fprintf Stream resource, format, args Writes output to stream
6.7. Regular Expression – RegEx:
- The most powerful tools in the string manipulation toolbox are regular expressions
6.7.1. Introduction:
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6.7.2. Character Class: allow a pattern to match multiple characters simultaneously
Metacharacter Characters Matched \d Digits 0-9 \D Anything not a digit \w Any alphanumeric character or an underscore (_) \W Anything not an alphanumeric character or an underscore \s Any whitespace (spaces, tabs, newlines) \S Any non-whitespace character . Any character except for a newline ^ Match the start of the string $ Match the end of the string
Ex 1: the expression /ab[cd]e/ matches abce and abde . Ex 2: the expression /ab[c-e\d]/ will match abc , abd , abe and any combination of ab
followed by a digit.
6.7.3. Quantifiers: allows you to specify the number of times a particular character or metacharacter can appear in a matched string. 4 types of quantifiers:
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* The character can appear zero or more times + The character can appear one or more times ? The character can appear zero or one times {n,m} The character can appear at least n times, and no more than m. Either
parameter can be omitted to indicated a minimum limit with no maximum, or a maximum limit without a minimum, but not both
Ex: the expression /ab?c/ matches both ac and abc , while ab{1,3}c matches abc , abbc , abbbc .
6.7.4. Match & Extract strings: preg_match() and preg_match_all() . Ex:
$str = 'foobar: 2008 - hello: 2009'; preg_match('/(?<name>\w+): (?<digit>\d+)/', $str, $ matches); print_r($matches); //Displays: Array ( [0] => foobar: 2008 [name] => foobar [1] => foobar [digit] => 2008 [2] => 2008 )
Ex 2: $str = 'foobar: 2008 - hello: 2009'; preg_match_all('/(\w+): (\d+)/', $str, $matches); print_r($matches); //Displays: Array ( [0] => Array ( [0] => foobar: 2008 [1] => hello: 2009 ) [1] => Array ( [0] => foobar [1] => hello ) [2] => Array
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( [0] => 2008 [1] => 2009 ) )
6.7.5. Replace string with Regex: preg_replace() . Ex:
$string = 'April 15, 2003'; $pattern = '/(\w+) (\d+), (\d+)/i'; $replacement = '${1}x,$3'; echo preg_replace($pattern, $replacement, $string);
// Displays "Aprilx,2003"
6.7.6. Split string by a regular expression: using preg_split() . Ex:
$keywords = preg_split("/[\d\s,]+/", "hyper1 lang2, prog"); print_r($keywords); // Displays Array ( [0] => hyper [1] => lang [2] => prog )
Chapter Exercise:
A> Write the function to check the file is the image or not. Input: filename, return TRUE/FALSE. Valid image type: jpg, jpeg, png, gif, bmp. B> Write the regular expression pattern to match an URI of an image. Example:
http://www.example.com/photo/some-directory/imagename.gif C> Write the regular expression pattern to match an email address.
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Chapter 7
HTTP Basic Keywords: http, html, header, form, request, response, get, post, cookie,
session, authentication, domain, timeout, expire, redirect, caching, file upload, apache, rewrite rule, htaccess.
Subjects:
7.1. HTTP Fundamentals
7.2. File Upload
7.3. Cookie
7.4. Session
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7.1. HTTP Fundamentals:
7.1.1. How HTTP works: (RFC 2616)
7.1.2. GET Method:
- Change URL after submit form
- using global variable $_GET or $_REQUEST to access data in form.
Ex:
$firstName = $_GET['FirstName']; $salary = $_GET['Salary']; $contractor = $_GET['Contractor'];
7.1.3. POST Method:
- Not change URL after submit form
- using global variable $_POST or $_REQUEST to access data in form.
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Ex:
$firstName = $_POST['FirstName']; $salary = $_POST['Salary']; $contractor = $_POST['Contractor'];
7.1.4. HTTP Request:
- Sample of request:
--------------------------------------------------------------------------------------------------------
GET Header Request: GET /dumprequest HTTP/1.1 Host: djce.org.uk User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1 ; en-US; rv:1.9.0.12)
Gecko/2009070611 Firefox/3.0.12 Accept: text/html,application/xhtml+xml,application /xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection: keep-alive Referer: http://www.google.com.vn/search?hl=vi&clie nt=firefox-a&rls=org.mozilla:en-
US:official&um=1&q=http%20request&ndsp=21&ie=UTF-8& sa=N&tab=iw
POST Header Request:
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POST /path/script.cgi HTTP/1.0 From: [email protected] User-Agent: HTTPTool/1.0 Content-Type: application/x-www-form-urlencoded Content-Length: 32 home=Mosby&favorite+flavor=flies
7.1.5. HTTP Response:
HTTP/1.1 200 OK Date: Sun, 08 Oct 2000 18:46:12 GMT Server: Apache/1.3.6 (Unix) Keep-Alive: timeout=5, max=120 Connection: Keep-Alive Content-Type: text/html <html>...
Some HTTP 1.1 status code:
Status Code
Reason Phrase
Description
200 OK Generic successful request message response. This is the code sent most often when a request is filled normally.
201 Created The request was successful and resulted in a resource being created. This would be a typical response to a PUT method.
301 Moved Permanently
The resource requested has been moved to a new URL permanently. Any future requests for this resource should use the new URL.
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This is the proper method of handling situations where a file on a server is renamed or moved to a new directory. Most people don't bother setting this up, which is why URLs “break” so often, resulting in 404 errors as discussed below.
302 Found The resource requested is temporarily using a different URL. The client should continue to use the original URL.
304 Not Modified The client sent a conditional GET request, but the resource has not been modified since the specified date/time, so the server has not sent it.
400 Bad request Server says, “huh?” Generic response when the request cannot be understood or carried out due to a problem on the client's end.
401 Unauthorized The client is not authorized to access the resource. Often returned if an attempt is made to access a resource protected by a password or some other means without the appropriate credentials.
404 Not Found The most common HTTP error message, returned when the server cannot locate the requested resource. Usually occurs due to either the server having moved/removed the resource, or the client giving an invalid URL (misspellings being the most common cause.)
500 Internal Server Error
Generic error message indicating that the request could not be fulfilled due to a server problem.
502 Bad Gateway The server, while acting as a gateway or proxy, received an invalid response from another server it tried to access on the client's behalf.
503 Service Unavailable
The server is temporarily unable to fulfill the request for internal reasons. This is often returned when a server is overloaded or down for maintenance.
504 Gateway Timeout
The server, while acting as a gateway or proxy, timed out while waiting for a response from another server it tried to access on the client's behalf.
7.1.6. Header:
- Using function header() to send a HTTP header.
Ex:
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header('Location: http://www.php.net/'); header("HTTP/1.0 404 Not Found");
7.2. File Upload:
7.2.1. Prepare form:
<form method="post" enctype="multipart/form-data" action="upload.php"> File to upload: <input type="file" name="myfile"><BR> <input type="submit" value="Submit"> </FORM>
7.2.2. Upload a file:
- Get uploaded file's data using $_FILES. Ex:
$name = $_FILES[myfile]['name']; $type = $_FILES[myfile][type]; $size = $_FILES[myfile][size]; $tmpname = $_FILES[myfile][tmp_name]; $error = $_FILES[myfile][error]; $uploadPath = 'uploads/photos/'.$name; // Begin to upload fileif (move_uploaded_file($tmpn ame, $uploadPath)) { echo 'Upload successfully!'; }
7.2.3. Upload multiple files:
- HTML form:
… File to upload: <input type="file" name="myfile[]"><BR> File to upload: <input type="file" name="myfile[]"><BR> …
- PHP script:
$nameA = $_FILES[myfile]['name'][0]; $tmpnameA = $_FILES[myfile][tmp_name][0];
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$uploadPathA = 'uploads/photos/'.$nameA; $nameB = $_FILES[myfile]['name'][1]; $tmpnameA = $_FILES[myfile][tmp_name][1]; $uploadPathB = 'uploads/photos/'.$nameB; // Begin to upload files …
7.3. Cookie:
7.3.1. How cookies work:
7.3.2. Create cookies: using setcookie() function. Ex:
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$value = 'something from somewhere'; setcookie("test", $value); setcookie("test", $value, time()+3600); /* expire i n 1 hour */ setcookie("test", $value, time()+3600, "/~test/", " .example.com", 1);
7.3.3. Get cookies data: using global variables $_COOKIES or $_REQUEST.
Ex:
echo $_COOKIE["test"];
7.3.4. Delete a cookie:
setcookie ("test", "", time() - 3600);
7.4. Session:
7.4.1. How sessions work:
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7.4.2. Create sessions: If you are using cookie-based sessions, you must call session_start() before anything is outputted to the browser.
session_start(); $_SESSION['username'] = 'testing';
7.4.3. Session ID processing: 7.4.3.1. Get the current Session ID: - session_id() : used to get or set the session id for the current session. Ex:
$currentSessID = session_id();
7.4.3.2. Re-generate Session ID: - session_regenerate_id() : Update the current session id with a newly generated one. 7.4.3.3. Example:
session_start(); $old_sessionid = session_id(); session_regenerate_id(); $new_sessionid = session_id(); echo "Old Session: $old_sessionid<br />"; echo "New Session: $new_sessionid<br />";
7.4.4. Delete a session:
session_destroy();
Chapter Exercise:
A> Design a webpage to display form for user login. The username is an email, and the password must be at least 6 characters. Password must be alphanumerical characters (a-z, A-Z, 0-9). If login success, displays the name of the user (extract from email) and the number of page which is refreshed by user.
Ex: enter email: [email protected], password: abc3456ad5, website will display:
Hello rasmus !
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You refreshed 3 times.
B> Write photo album function for the user (after login) from question A.
a. Upload images (png,gif,jpeg) – 5 images in a submit form b. Store images in directory "uploads/images/". c. Max file size: 300KB d. File name: USERNAME_imagename e. If image existed, append the letter "i" after name part. Ex: rasmus_image1.gif exists, will be
renamed to rasmus_image1i.gif
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Chapter 8
OOP Object-Oriented Programming Keywords: object, class, instance, inheritance, encapsulation, access,
constructor, destructor, property, method, visibility, parent, self, this, override, public, protected, private.
Subjects:
8.1. OOP Fundamentals
8.2. Properties
8.3. Methods
8.4. Inheritance & Overriding
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8.1. OOP Fundamentals:
8.1.1. What is OOP ?
- As we mentioned previously, the basic element of OOP is the class. A class contains the definition of data elements (or properties) and functions (or methods) that share some common trait and can be encapsulated in a single structure.
8.1.2. Declaring Class: Class name is case-insensitive
class ClassName { // Some Properties // Some Methods }
8.1.3. Instantiating an Object: To create an instance of a class, a new object must be created and assigned to a variable. An object will always be assigned when creating a new object unless the object has a constructor defined that throws an exception on error. Classes should be defined before instantiation.
- In the class context, it is possible to create a new object by new self and new parent.
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Ex: $myClassInstance = new MyClass(); $copyInstance = $myClassInstance;
8.2. Properties:
8.2.1. Declaration & Visibility: The default value must be a constant expression, not (for example) a variable, a class member or a function call.
Ex: class foo { //valid declaration public $name; protected $age; private $type; public $var1 = "Test"; // String public $var2 = 1.23; // Numeric value public $var3 = array(1, 2, 3); // Array //invalid declaration $var4 = TRUE; public $var1 = 'hello '.'world';
public $var2 = <<<EOD hello world EOD; public $var3 = 1+2; public $var4 = self::myStaticMethod(); public $var5 = $myVar;
}
8.2.2. Constant:
Ex: class foo { const BAR = 'Hello World'; } echo foo::BAR;
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8.3. Methods:
8.3.1. Declaration:
- A class method/functions is the behavior/functionality of a class i.e. they provide the necessary code for the class in which it is defined.
- A class method is exactly similar to PHP functions, it’s just that class functions are declared inside classes and accessed using the -> (arrow operator / dereferencing operator).
- Methods can also be declared as either public, protected or private.
- Example:
class MyClass { public function myFunction() { echo 'You called MyClass::myFunction'; //call the private function $this->myPrivate(); } private function myPrivate() { echo "\nThis is a private function."; } } $obj = new MyClass(); $obj->myFunction(); //Displays: You called MyClass::myFunction This is a private function.
- A pseudo-variable, $this is available when a method is called from within an object context. Ex:
class Shirt { public $color; private function getColor()
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{ echo $this->color; } public function say() { $this->getColor(); } } $redShirt = new Shirt(); $redShirt->color = 'Red'; $blueShirt = new Shirt(); $blueShirt->color = 'Blue'; $redShirt->say(); // Displays 'Red' $blueShirt->say(); // Displays 'Blue'
8.3.2. Constructor: Using __construct() method.
- A constructor is a special function of a class that is automatically executed whenever an object of a class gets instantiated.
- It is needed as it provides an opportunity for doing necessary setup operations like initializing class variables, opening database connections or socket connections, etc. In simple terms, it is needed to setup the object before it can be used.
- In PHP5 a constructor is defined by implementing the __construct() method. This naming style has been introduced in PHP5. In PHP4, the name of the constructor was the same name as that of the class. So, for example if you had a class Customer, you would have to implement a function Customer().
- PHP5 to be backward complaint also supports the PHP4 rule. When an object is created, PHP5 searches for __construct() first. If __construct() is not defined it then searches for a method with the same that of the class. However, if you define both; PHP5 will first search for __construct() method and execute it if available, otherwise it will execute the same class name function.
- Unlike other programming languages where overloaded argument constructors is possible, in PHP5 you cannot overload constructors.
- Example:
class Shirt
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{ public $color; function __construct($myColor) { $this->color = $myColor; } private function getColor() { echo $this->color; } public function say() { $this->getColor(); } } $redShirt = new Shirt('Red'); $blueShirt = new Shirt('Blue'); $redShirt->say(); // Displays 'Red' $blueShirt->say(); // Displays 'Blue'
8.3.3. Destructor: Using __destruct() method.
- A destructor is a special function of a class that is automatically executed whenever an object of a
class is destroyed:
1. it goes out of scope, 2. when you specifically set it to null, 3. when you unset it or when the program execution is over.
- A PHP5 destructor is defined by implementing the __destruct() method. In PHP4 however, the
concept of a destructor did not exist.
- A destructor cannot take any arguments.
- Example:
class Shirt { public $color;
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function __construct($myColor) { $this->color = $myColor; } function __destruct() { echo $this->color . ' is dead'; } private function getColor() { echo $this->color; } public function say() { $this->getColor(); } } $redShirt = new Shirt('Red'); $blueShirt = new Shirt('Blue'); $redShirt->say(); // Displays 'Red' $blueShirt->say(); // Displays 'Blue'
$redShirt = null; // Displays 'Red is dead';
unset($blueShirt); // Displays 'Blue is dead';
8.3.4. Static Property & Method:
- Declaring class properties or methods as static makes them accessible without needing an instantiation of the class. A property declared as static can not be accessed with an instantiated class object (though a static method can).
- Because static methods are callable without an instance of the object created, the pseudo variable $this is not available inside the method declared as static.
- Static properties cannot be accessed through the object using the arrow operator ->.
- Example:
class MyClass
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{ static $var1 = 'hello'; public static function myFunction() { echo 'Hello World'; } } $obj = new MyClass(); $obj->myFunction(); // Displays "Hello World" echo $obj->var1; // Invalid, it shows a notice MyClass::myFunction(); // Displays "Hello World" echo MyClass::$var1; // Displays "hello"
8.4. Inheritance & Overriding:
8.4.1. Inheritance:
- Inheritance is the mechanism of deriving a new class from an existing class. It allows a sub-class / child class to share/inherit the properties and methods of a base-class or parent class.
- To inherit in PHP5, you should use the keyword ‘extends’ in the class definition. In PHP5 only single inheritance is allowed. Ex:
class Person { private $name; private $address; public function getName() { return $this->name; } } class Customer extends Person { private $customer_id; private $record_date;
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public getCustomerId() { return $this->customer_id; } public getCustomerName() { return $this->getName(); // getName() is in Person } }
8.4.2. Access specifiers in Inheritance:
+ Public: A public access specifier allows the properties and methods to be accessed from anywhere in the script. Please note that if you declare any properties or method without a access specifier it is considered as ‘public’. Ex:
Class Person { public $age = 20; } Class Customer extends Person { } $myCustomer = new Customer(); echo $myCustomer->age;
+ Private: A private access specifier is used to hide properties and methods. A method or property declared as private can only be accessed by the class itself and neither the outside program nor the derived class can have access to it. The reason why properties are declared private is to avoid the outside programs to either accidently modify the values without necessary validation. Ex:
class Customer { private $name; public $age; public function __construct($name, $age) { $this->name = $name; $this->age = $age; } } $c = new Customer("Sunil","28"); echo "Name : " . $c->name; // displays an error
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+ Protected: A protected access specifier allows the derived class to access the properties and methods of the base class. Ex:
class Person { protected $name; } class Customer extends Person { function setName($name) { //this works as $name is protected in Person $this->name = $name; } } $c1 = new Customer(); $c1->setName("Sunil"); $c1->name = "Sunil"; // Displays an error as $name is protected and not
public
8.4.3. Overriding:
- Method overriding is when the method of base class is re-defined with the same name, function signature and access specifier (either public or protected) of the derived class. The reason to override method is to provide additional functionality over and above what has been defined in the base class. Ex:
class Bird { public function fly() { echo "Fly method of Bird Class called"; } } class Eagle extends Bird { public function fly() { echo "Fly method of the Eagle Class called"; } } class Chicken extends Bird {
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public function fly() { echo "Fly method of the Chicken Class called"; } } $e = new Eagle(); $c = new Chicken(); $e->fly(); // Displays "Fly method of the Eagle Cl ass called" echo "\n"; $c->fly(); // Displays "Fly method of the Chicken Class called"
- Examples:
class Car { protected $color; protected $hoursepower; protected $seatCount; protected $type; public $size = 'Small'; function __construct() {
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$this->type = 'Car'; } public function run() { echo $this->type . ' is running !'; } } class RaceCar extends Car { private $nitro; function __construct() { $this->type = 'Race Car'; $this->size = 'Medium'; } public function run() { Echo $this->type . ' is racing !'; } } class Truck extends Car { private $trailer; protected $type = 'Truck'; } $car = new Car(); $car->run(); // Displays "Car is running!" $racecar = new RaceCar(); $racecar->run(); // Displays "Race Car is racing!" $truck = new Truck(); $truck->run(); // Display ?
8.4.4. Invoke Parent Methods:
- When you override a method of the base class, it’s functionality is completely hidden unless it has been explicitly invoked from the child class. To invoke a parent class method you should use the keyword parent followed by the scope resolution operator followed by the name of the method as mentioned below.
- Syntax:
parent::method_name();
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- Example:
class Person { public function showData() { echo "This is Person's showData()\n"; } } class Customer extends Person { public function showData() { parent::showData(); echo "This is Customer's showData()\n"; } } $c = new Customer(); $c->showData(); // Displays This is Person’s showData()
This is Customer’s showData()
8.4.5. Invoke Parent Constructor & Destructor:
- We can get the parent PHP5 constructor and PHP5 Destructor to be invoked in the same way as invoking the parent method
- Example:
class Person { public function __construct() { echo "This is Person's __construct()\n"; } public function __destruct() { echo "This is Person's __destruct()\n"; } } class Customer extends Person { public function __construct()
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{ parent::__construct(); echo "This is Customer's __construct()\n"; } public function __destruct() { parent::__destruct(); echo "This is Customer's __destruct()\n"; } } $c = new Customer(); // Displays This is Person’s __construct()
This is Customer’s __construct() This is Person’s __destruct() This is Customer’s __destruct()
Chapter Exercise:
Website: Design a webpage to display form for user login. The username is an email, and the password must be at least 6 characters. Password must be alphanumerical characters (a-z, A-Z, 0-9). If login success, displays the name of the user (extract from email) and the number of page which is refreshed by user.
Ex: enter email: [email protected], password: abc3456ad5, website will display:
Hello rasmus !
You refreshed 3 times.
A> Write photo album function for the user (after login)
a. Upload images (png,gif,jpeg) – 5 images in a submit form b. Store images in directory "uploads/images/". c. Max file size: 300KB d. File name: USERNAME_imagename e. If image existed, append the letter "i" after name part. Ex: rasmus_image1.gif exists, will
be renamed to rasmus_image1i.gif
B> Find all classes in application. Ex: User…
C> Write the website using Class.
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Chapter 9
File Handling Keywords: file, directory, filename, extension, handle, stream, read,
write, permission, file wrapper, protocol, path, append, buffer, socket, open, close, timeout.
Subjects:
9.1. File Handle
9.2. File Manipulation
9.3. Directory
9.4. File & Directory Constants
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9.1. File Handle:
9.1.1. Create file handle:
- The fopen() function is used to open files in PHP.
- The first parameter of this function contains the name of the file to be opened and the second parameter specifies in which mode the file should be opened:
$fileHandle = fopen('counter.txt', 'w+');
9.1.2. File open mode:
Mode Description r Open for reading only; place the file pointer at the beginning of the file. r+ Open for reading and writing; place the file pointer at the beginning of the file. w Open for writing only; place the file pointer at the beginning of the file and
truncate the file to zero length. If the file does not exist, attempt to create it. w+ Open for reading and writing; place the file pointer at the beginning of the file
and truncate the file to zero length. If the file does not exist, attempt to create it.
a Open for writing only; place the file pointer at the end of the file. If the file does not exist, attempt to create it.
a+ Open for reading and writing; place the file pointer at the end of the file. If the file does not exist, attempt to create it.
x Create and open for writing only; place the file pointer at the beginning of the file. If the file already exists, the fopen() call will fail by returning FALSE and generating an error of level E_WARNING . If the file does not exist, attempt to create it.
x+ Create and open for reading and writing; place the file pointer at the beginning of the file. If the file already exists, the fopen() call will fail by returning FALSE and generating an error of level E_WARNING . If the file does not exist, attempt to create it.
9.1.3. Close file handle:
- In PHP it is not system critical to close all your files after using them because the server will close all files after the PHP code finishes execution. However the programmer is still free to make mistakes (i.e. editing a file that you accidentally forgot to close). You should close all files after you have finished with them because it's a good programming practice
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fclose($fileHandle);
- After a file has been closed down with fclose it is impossible to read, write or append to that file unless it is once more opened up with the fopen function.
9.2. File Manipulation:
Function Handle Description
file_exists() Checks whether a file or directory exists.
Ex: if (file_exists('uploads/photo/a.jpg')) { echo "The file exists"; }
is_file() Tells whether the filename is a regular file.
Ex: var_dump(is_file('uploads/photo/a.jpg')); // Displays "bool(true)" if file exists and is a regular file.
is_readable() Tells wheter the filename is readable.
Ex: if (is_readable($filename)) { echo 'The file is readable'; }
is_writable() Tells whether the filename is writable. fread() Yes Reads data from file, with specified length.
Ex: $contents = fread($handle, 2048);
fwrite() Yes Writes data to file. Ex: $writeByte = fwrite($handle, $ somecontent);
rewind() Yes Rewind the position of a file pointer.
Ex: $rewindStatus = rewind($handle);
file_get_contents() Reads entire file into a string.
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Ex: $contents = file_get_contents('config/text.txt');
chmod() Changes file mode. Ex: chmod("/somedir/somefile", 0666);
copy() Copies file.
Ex: if (!copy($file, $newfile)) { echo "failed to copy $file...\n"; }
rename() Renames a file or directory.
Ex: rename("file.txt", "upload/user.txt");
filesize() Gets file size.
Ex: $size = filesize('upload/user.txt');
unlink() Deletes a file.
Ex: if(unlink('upload/user.txt'')) echo 'Delete successfully!';
filemtime() Gets file modification time. Return the Unix Timestamp.
Ex: $timestamp = filemtime('myfile.jpg');
pathinfo() Returns information about a file path.
Ex:
$path_parts = pathinfo('/www/htdocs/index.html'); echo $path_parts['dirname'], "\n"; echo $path_parts['basename'], "\n"; echo $path_parts['extension'], "\n"; echo $path_parts['filename'], "\n";
// Displays
/www/htdocs index.html html
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index
9.3. Directory:
9.3.1. Open directory handle:
$dh = opendir('uploads/photos/');
9.3.2. Useful directory functions:
Function Handle Description readdir() Yes Reads entry from directory handle is_dir() Tells whether the filename is a directory mkdir() Makes directory.
Ex: mkdir("/path/to/my/dir", 0700, true);
rmdir() Removes directory. Note: directory must be empty dirname() Returns directory name component of path.
Ex: $path = "/etc/passwd"; $file = dirname($path); // $file is set to "/etc"
9.3.3. Close directory handle:
closedir($dh);
9.3.4. Example:
if ($handle = opendir('.')) { while (false !== ($file = readdir($handle))) { if ($file != "." && $file != "..") {
echo "$file\n"; } }
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closedir($handle); }
9.4. File & Directory Constants:
9.4.1. __FILE__ : get the current executed file. Example:
echo dirname(__FILE__);
9.4.2. DIRECTORY_SEPARATOR : get the directory of the current system. '\' in Windows and '/' in Linux.
Chapter Exercise:
Write the website allows user register, login to system. After logging, users can upload photos, view their uploaded photos, deleting their photos. Each user has a photo directory with his name. a. When register, there is no 2 users with the same name. b. Password using md5() function to store c. Photos must be jpg,gif,png and size is not larger than 300KB d. User information stored in file with format: " rasmus,198792ks90s978jhsludssdf098s9adj,[email protected],AVATAR_URL bob, lakljliuaklnkajsdoif928379skjad,[email protected],AVATAR_URL … "
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Chapter 10
MySQL Keywords: DBMS, database, schema, mysql, table, column, row, index,
unique, primary, foreign, key, relationship, create, insert, update, delete, dropping, select, query, statement, condition.
Subjects:
10.1. DBMS Fundamentals
10.2. MySQL Fundamentals
10.3. MySQL Basics
10.4. Using phpMyAdmin
10.5. MySQL in PHP
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10.1. DBMS Fundamentals:
10.1.1. DBMS Concept:
- A DBMS is a set of software programs that controls the organization, storage, management, and retrieval of data in a database.
10.1.2. DBMS Features:
+ Query Ability
+ Backup & Replication
+ Rule enforcement
+ Security
+ Computation
+ Change and access logging
+ Automated Optimization
10.1.3. Relational DBMS (RDBMS) :
- a database management system (DBMS) that is based on the relational model
- Most popular commercial and open source databases currently in use are based on the relational model.
- data is stored in the form of tables and the relationship among the data is also stored in the form of tables.
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10.2. MySQL Fundamentals:
10.2.1. MySQL Introduction:
- is a relational database management system
- Its popularity for use with web applications is closely tied to the popularity of PHP, which is often combined with MySQL
- MySQL is commonly used by free software projects which require a full-featured database management system, such as WordPress, phpBB and other software built on the LAMP software stack. It is also used in very high-scale World Wide Web products including Google(not for searches), Facebook, Flickr, Wikipedia, Nokia, YouTube…
10.2.2. MySQL Using:
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10.2.2.1. Graphical User Interface - GUI:
- Navicat MySQL:
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- SQLyog:
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10.2.2.2. Shell:
10.2.2.3. PHP Scripts:
<?php $username="username"; $password="password"; $database="your_database"; $first=$_POST['first']; $last=$_POST['last']; $phone=$_POST['phone']; $mobile=$_POST['mobile']; $fax=$_POST['fax']; $email=$_POST['email'];
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$web=$_POST['web']; mysql_connect("localhost",$username,$password); mysql_select_db($database) or die( "Unable to selec t database"); $query = "INSERT INTO contacts VALUES ('','$first','$last','$phone','$mobile','$fax','$em ail','$web')"; mysql_query($query); mysql_close(); ?>
10.2.2.4. phpMyAdmin:
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10.3. MySQL Basic:
10.3.1. Create Database:
- A MySQL database is nothing in itself. Rather a MySQL database is a way of organizing a group of tables. If you were going to create a bunch of different tables that shared a common theme, you would group them into one database to make the management process easier.
- creates a database with the given name.
CREATE DATABASE database_name
- Ex:
CREATE DATABASE employee
10.3.2. Create Tables:
- In MySQL and other database systems, the goal is to store information in an orderly fashion. The table gets this done by making the table up of columns and rows.
- The columns specify what the data is going to be, while the rows contain the actual data. Below is how you could imagine a MySQL table. (C = Column, R = Row)
- Before you can enter data (rows) into a table, you must first define what kinds of data will be stored (columns)
CREATE TABLE example ( id INT NOT NULL AUTO_INCREMENT, PRIMARY KEY(id), name VARCHAR(30), age INT )
- Query description:
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+ "id INT NOT NULL AUTO_INCREMENT" : Here we create a column "id" that will automatically increment each time a new entry is added to the table. This will result in the first row in the table having an id = 1, the second row id = 2, the third row id = 3, and so on.
• INT - This stands for integer or whole number. 'id' has been defined to be an integer. • NOT NULL - These are actually two keywords, but they combine together to say that this
column cannot be null. An entry is NOT NULL only if it has some value, while something with no value is NULL.
• AUTO_INCREMENT - Each time a new entry is added the value will be incremented by 1.
+ "PRIMARY KEY(id)" : PRIMARY KEY is used as a unique identifier for the rows. Here we have made "id" the PRIMARY KEY for this table. This means that no two ids can be the same, or else we will run into trouble.
+ "name VARCHAR(30)" : Here we make a new column with the name "name"!
VARCHAR stands for "variable character". "Character" means that you can put in any kind of typed information in this column (letters, numbers, symbols, etc). It's "variable" because it can adjust its size to store as little as 0 characters and up to a specified maximum number of characters.
+ "age INT" : Our third and final column is age, which stores an integer. Notice that there are no parentheses following "INT"
10.3.3. Insert values:
- When inserting data it is important to remember the exact names and types of the table's columns.
INSERT INTO tbl_name (a,b,c) VALUES(1,2,3),(4,5,6),(7,8,9);
10.3.4. Retrieve data from database:
- Usually most of the work done with MySQL involves pulling down data from a MySQL database. In MySQL, data is retrieved with the "SELECT" keyword
- Syntax:
SELECT [ALL | DISTINCT | DISTINCTROW ] select_expr [, select_expr ...] [FROM table_references [WHERE where_condition] [GROUP BY {col_name | expr | position} [ASC | DESC], ... [WITH ROLLUP]]
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[HAVING where_condition] [ORDER BY {col_name | expr | position} [ASC | DESC], ...] [LIMIT {[offset,] row_count | row_count OFFSET offset}]
- Ex:
SELECT * FROM countries ORDER by iso_code IN ('UK', 'US') DESC SELECT *, COUNT(field) FROM table GROUP BY field HA VING COUNT(count)>=1;
10.3.5. Change values:
- Update values of one or more rows in tables
- Syntax: UPDATE table_name SET field = value, Field = value WHERE … LIMIT …
- Ex: UPDATE items, month SET items.price = month.price WHERE items.id = month.id;
10.3.6. Delete rows:
- From time to time, you may even need to delete items from your database. Some potential reasons for deleting a record from MySQL include when: someone deletes a post from a forum, an employee leaves a company.
- Before performing a large delete on a database, be sure to back up the table/database in case your script takes off a little more than desired. Test your delete queries before even thinking about using them on your table.
- Syntax:
DELETE FROM table_name WHERE … LIMIT …
- Ex:
DELETE FROM users
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WHERE activated = 0 LIMIT 10
10.3.7. Remove tables:
- To remove a table from a MySQL database, and remove all of its data, use the following SQL command:
DROP TABLE table_name
10.3.8. Remove databases:
- Drops all tables in the database and deletes the database.
- Be very careful with this statement! To use DROP DATABASE, you need the DROP privilege on the database.
DROP DATABASE database_name
- Ex: DROP DATABASE mydbtest
10.4. Using phpMyAdmin:
10.4.1. Login to phpMyAdmin:
- Using URL: http://localhost/phpmyadmin/
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10.4.2. Create Database:
10.4.3. Creat Table:
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10.4.4. Select Database:
- Select the dropdown box on the left panel, click the database you want to working.
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10.4.5. Select Table:
- Click a table on the left panel to select
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10.4.6. Change Table Structure:
- Select the columns you want to change structure, click Edit button
10.4.7. Insert Value to Table:
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- Select the table you want to insert value
- Click the INSERT tab to begin insert data
10.4.8. View All Data of Table:
- Select the table you want to view data
- Click the BROWSE tab to view table data
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10.4.9. Edit Value of Rows:
- Edit 1 Row by click on the Edit icon () on selected row.
- Delete multiple rows by click the checkbox before each row, after that, click the Edit icon ( ) followed the data tables.
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- In the Editing page, update your value, and click Go button to save.
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10.4.10. Delete Rows in Table:
- Delete 1 Row by click on the Delete icon () on selected row.
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- Delete multiple rows by click the checkbox before each row, after that, click the Delete icon ( ) followed the data tables.
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10.4.11. Export SQL Data:
- Select the database, click the export tab
- choose the tables you want to export and click GO button at the bottom to begin export.
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10.4.12. Import SQL Data from File:
- Click the Import Tab to open Import page
- Browse the SQL Data file you want to import
- Click GO button to begin importing file.
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10.4.13. Query Data:
- Click the SQL Tab to open Query page
- Type you queries and click GO button to run queries.
10.4.14. Clear All Table Data:
- Select Table you want to clear data
- click Empty Tab, it will show a prompt dialog, click OK if you agree to clear table's data.
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10.4.15. Drop Table:
- Select Table you want to delete (drop)
- click Drop Tab, it will show a prompt dialog, click OK if you agree to drop table.
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10.4.16. Drop Database:
- Select the database you want to delete (drop)
- Click the Drop TAB, it will show a prompt dialog, click OK if you agree to delete database.
10.5. MySQL in PHP:
10.5.1. Connect to MySQL Server:
- Open a connection to a MySQL Server.
- Returns a MySQL link identifier on success, or FALSE on failure.
- Ex:
$link = mysql_connect('localhost', 'mysql_user', 'm ysql_password'); if (!$link)
{ die('Could not connect: ' . mysql_error()); } echo 'Connected successfully';
10.5.2. Select MySQL database:
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- Select a MySQL database.
- Every subsequent call to mysql_query() will be made on the active database.
- Returns TRUE on success or FALSE on failure.
//Select the test database $db_selected = mysql_select_db('test', $link);
if (!$db_selected) {
die ('Can\'t use foo : ' . mysql_error()); }
10.5.3. Close MySQL connection:
- Close MySQL connection.
- Using mysql_close() isn't usually necessary, as non-persistent open links are automatically closed at the end of the script's execution
mysql_close($link);
10.5.4. Some Useful Functions:
Function Description mysql_query() Sends a MySQL query.
Ex: $result = mysql_query('SELECT * FROM employee');
mysql_fetch_row() Get a result row as an enumerated array. Ex: $row = mysql_fetch_row($result);
mysql_fetch_array() Fetch a result row as an associative array, a numeric array, or both. Ex: $row = mysql_fetch_array($result,MYSQL_ASSOC);
mysql_num_rows() Get number of rows in result. Ex:
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$num_rows = mysql_num_rows($result); mysql_affected_rows() Get number of affected rows in previous MySQL operation.
Ex: $affectedRows = mysql_affected_rows();
mysql_real_escape_string() Escapes a string for use in a mysql_query(). Ex: $securedStr = mysql_real_escape_string($str);
mysql_insert_id() Get the ID generated from the previous INSERT operation. Ex: $latestUserId = mysql_insert_id();
mysql_free_result() Free result memory. Ex: mysql_free_result($result);
Chapter Exercise:
Edit the website at Chapter 9, using MySQL Database instead of Files to store user information.
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Chapter 11
Logging & Debugging
Keywords: log, trace, tracking, error, warning, notice, debug, error reporting, phped, debugger, step, breakpoint.
Subjects:
11.1. Log Configuration
11.2. PhpEd Debugger Installation
11.3. Debugging
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11.1. Log Configuration:
11.1.1. php.ini directives:
error_reporting = E_ALL & ~E_NOTICE error_log = /var/log/php-scripts.log display_errors = Off log_errors = On
11.1.2. Setting on PHP script:
ini_set("log_errors" , "1"); ini_set("error_log" , "Errors.log.txt"); ini_set("display_errors" , "0");
11.2. PhpEd Debugger Installation:
11.2.1. Install PhpEd Debugger:
- Go to debugger folder of phpEd (Ex: "C:\Program Files\nusphere\phped\debugger\server\"), Find the correct platform (Linux, Windows…) and correct PHP version on server to copy the extension to the PHP Extension folder on the server.
- In this case, my AppServ 2.10 was installed on Windows XP, so, I copy file "nusphere\phped\debugger\server\Windows\x86\dbg-php-5.2.dll" to folder "D:\AppServ\php5\ext\" folder.
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11.2.2. php.ini debugger configuration:
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- Add the dbg-php-5.2.dll extension to PHP Extension list in PHP.INI File. Insert this line in the extension section:
extension=dbg-php-5.2.dll
- Continue editing the PHP.INI file to active the debuger. Add these lines to PHP.INI File.
[debugger] debugger.enabled=on debugger.profiler_enabled=on debugger.hosts_allow=host1 host2 host3 debugger.hosts_deny=ALL debugger.ports=7869, 10000/16
11.2.3. Using Extension DBGbar Toolbar on Firefox:
11.3. Debugging:
11.3.1. Using Debugging Mode:
- Open PhpEd.
- Open website using Firefox, click on the DBGbar, select 'Debug this page' to jump to Debugging Mode of PhpEd.
11.3.2. Step debugging:
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11.3.3. Watching Variables value when debugging
- Using Watch Dialog to view the current value of variables.
- Type the variable name, and you will get the value of variable.
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11.3.4. Using Breakpoint:
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- Breakpoint is the location in programming code that, when reached, triggers a temporary halt in the program.
- Programmers use breakpoints to test and debug programs by causing the program to stop at scheduled intervals so that the status of the program can be examined in stages.
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Chapter 12
OOP Advanced Keywords: interface, abstract, final, access, exception, lazy loading.
autoload, reflection.
Subjects:
12.1. Interface
12.2. Abstract Class, Method
12.3. Final Class, Method
12.4. Lazy Loading
12.5. Magic Methods
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12.1. Interface:
12.1.1. Interface Introduction:
- Object interfaces allow you to create code which specifies which methods a class must implement, without having to define how these methods are handled.
12.1.2. Declaration:
- Interfaces are defined using the interface keyword, in the same way as a standard class, but without any of the methods having their contents defined.
- All methods declared in an interface must be public, this is the nature of an interface.
- Example:
interface IAnimal { function eat(); function say(); }
12.1.3. Implementation:
interface IAnimal { function eat(); function say(); } class Dog implements IAnimal { function eat(){ echo 'Dog is eating'; } function say(){ echo 'I am a dog'; } } class Cat implements IAnimal { function eat(){ echo 'Cat is eating';} function say(){ echo 'I am a cat'; } } $dog = new Dog(); $cat = new Cat(); $dog->say(); // Display "I am a dog" $cat->say(); // Display "I am a cat"
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12.2. Abstract Class, Method:
- An abstract class defines the basic skeleton for the class. It contains properties and methods but some methods are incomplete and is waiting for some other class to extend it through inheritance so that the derived class provides a full functionality for the incomplete methods.
- A abstract class cannot be instantiated and it can only be extended. A class prefix with “abstract” keywords are abstract class.
- If a method is defined as abstract then it cannot be declared as private (it can only be public or protected).
- Syntax:
abstract class classname { //properties and methods abstract function methodname(); } class derived extends classname { function methodname(){} }
- Example: abstract class Review {
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abstract function record(); public function normalMethod(){echo 'it is a norma l method';} } class CustomerReview extends Review { function record(){ echo 'Customer Review record';} } class EditorialReview extends Review { function record(){echo 'Editorial Review record';} } $cusReview = new CustomerReview(); $cusReview->record(); // Displays "Customer Review record" $review = new Review(); // Fatal Error
12.3. Final Class, Method:
12.3.1. Final Class:
- A final class is a class that cannot be extended. To declare a class as final, you need to prefix the ‘class’ keyword with ‘final’.
- You should declare a class as final when you think that you implementation of that class should not change in the derived class. You should do this mainly for Utility classes where you don’t want the behavior/implementation of your class to change.
- Example:
final class FinalClass { function hello(){echo 'Final class says hello!';} } class ChildFinalClass extends FinalClass { }
12.3.2. Final Method:
- Final method is a method that cannot be overridden. To declare a method as final, you need to prefix the function name with the ‘final’ keyword
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- You should declare a class method as final when you think that the method you develop contains necessary functionality to support your application and any modification or change to the functionality can cause unexpected errors/bugs.
- Example:
class NormalClass { final function hello(){echo 'Normal class says hel lo!';} } class ChildNormalClass extends NormalClass { function hello(){echo 'testing';} }
12.4. Lazy Loading:
12.4.1. Introduction:
- Loading of class on-demand.
- When referencing a non-existent class, be it as a type hint, static call, or instantiating an object, PHP will try to call the __autoload() global function so that the script may be given an opportunity to load it.
12.4.2. Magic Method __autoload() :
- The magic method __autoload() function is a convenience that allows you to use classes without having to explicitly write code to include them.
- The magic method __autoload() is not included in your class definition as this is to be called once in a script. The best place to put the autoload() file is in your configuration file which is loaded in all your other scripts.
-The __autoload() method is called only once for each new class that needs to be loaded. Subsequent instantiation of the Customer class object will not call the __autoload() method again. Therefore, this offers performance improvements in your scripts because, unless the class is needed - files are not loaded. Therefore, the PHP engine does not have to parse and compile an unnecessary file.
12.4.3. Implement Lazy Loading:
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function __autoload($class) { require_once str_replace(" ", "/", $class); } $obj= new Some_Class();
12.5. Magic Methods:
12.5.1. Property Overloading:
12.5.1.1. __get() : reading data from inaccessible properties. Example:
Class test { public $var1 = 'abc'; private $pvar2 = 'hello'; function __get($name) { $privateName = 'p'.$name; if(isset($this->$privateName)) { return $this->$privateName; } else return ''; } } $myTest = new test(); echo $myTest->var1; // Displays "abc" echo $myTest->pvar2; // Displays nothing echo $myTest->var2; // Displays "hello"
12.5.1.2. __set() : writing data to inaccessible properties. Example:
Class test { public $var1 = 'abc'; private $pvar2 = 'hello'; function __get($name) { $privateName = 'p'.$name; if(isset($this->$privateName))
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{ return $this->$privateName; } else return ''; } function __set($name, $value) { $privateName = 'p'.$name; if(isset($this->$privateName)) { //can validate input data here //… //assign to private property $this->$privateName = $value; } } } $myTest = new test(); $myTest->var1 = 'def'; // Assigns $var1 = "def" $myTest->pvar2 = 'world'; // Do nothing $myTest->var2 = 'world'; // Assigns $pvar2 = "worl d" echo $myTest->var2; // Displays "world"
12.5.1.3. __isset() : is triggered when calling isset() or empty() on inaccessible properties. Example:
Class test { public $var1 = 'abc'; private $p = array('var2'=>'hello'); function __isset($name) { if(isset($this->p[$name])) { return true; } else return false; } } $myTest = new test(); var_dump(isset($myTest->var1)); // Displays "bool( true)"
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var_dump(isset($myTest->pvar2)); // Displays "bool (false)" var_dump(isset($myTest->var2)); // Displays "bool( true)"
12.5.1.4. __unset() : is triggered when calling unset() on inaccessible properties. Example:
Class test { public $var1 = 'abc'; private $p = array('var2'=>'hello'); function __unset($name) { if(isset($this->p[$name])) { unset($this->p[$name]); } } } $myTest = new test(); unset($myTest->var1); unset($myTest->var2);
12.5.2. Method Overloading:
12.5.2.1. __call() : is triggered when invoking inaccessible methods in an object context. Example:
Class test { public function __call($name, $arguments) { echo "Calling $name(".implode(', ', $arguments)." )\n"; } } $myTest = new test(); $myTest->unknowfunction(1,2); // Displays "Calling unknowfunction(1, 2)"
12.5.2.2. __callStatic() : is triggered when invoking inaccessible methods in a static context. Note: PHP Version >= 5.3. Example:
Class test { public function __callStatic($name, $arguments)
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{ echo "Calling Static method test::$name(".implode (', ',
$arguments).")\n"; } } test::unknowfunction(1,2); // Displays "Calling Static method test::unknowfunc tion(1, 2)"
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Chapter 13
MySQL
Advanced Keywords: MyISAM, InnoDB, join, statement, prepared statement,
transaction, PDO.
Subjects:
13.1. Table Joining
13.2. PHP Data Object (PDO)
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13.1. Table Joining:
13.1.1. Introduction
- Combines records from two or more tables in a database.
13.1.2. Inner Join:
- The INNER JOIN clause tells the database to only return rows where there is a match found between tableA and tableB. An INNER JOIN is most often (but not always) created between the primary key column of one table and the foreign key column of another table.
SELECT * FROM employee INNER JOIN department ON employee.DepartmentID = department.Dep artmentID
Or:
SELECT * FROM employee, department WHERE employee.DepartmentID = department.Departmen tID
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13.1.3. Left Join:
- The LEFT JOIN keyword returns all rows from the left table (table A), even if there are no matches in the right table (table B).
SELECT * FROM employee LEFT JOIN department ON employee.DepartmentID = department.DepartmentID;
13.1.4. Right Join:
- The RIGHT JOIN keyword Return all rows from the right table (table B), even if there are no matches in the left table (table A).
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SELECT * FROM employee RIGHT JOIN department ON employee.DepartmentID = department.DepartmentID
13.1.5. Self Join:
- Table is joined to itself and is made possible by aliasing the original table.
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SELECT Employees.EmployeeID, Employees.Name, Employees.Salary, Manager.Name AS Manager FROM Employees LEFT JOIN Employees AS Manager ON Employees.ManagerID = Manager.EmployeeID WHERE (Employees.EmployeeID = '087652';
13.2. PHP Data Object (PDO):
13.2.1. PDO Introduction:
- PDO : PHP Data Object - PHP5 - OOP
13.2.2. Connect to MySQL:
try {
$dbh = new PDO("mysql:host=localhost;dbname=test", 'username', 'password'); echo 'Connected to database';
} catch(PDOException $e) { echo $e->getMessage(); }
// query here //close connection $dbh = null;
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13.2.3. Query:
13.2.3.1. Using PDO::exec() method: Execute an SQL statement and return the number of affected rows.
Ex:
/* Delete some rows from the Employee table */ $count = $dbh->exec("DELETE FROM employee WHERE Dep artmentID > 32"); /* Return number of rows that were deleted */ print("Deleted $count rows.\n");
13.2.3.2. Using PDO::query() method: Executes an SQL statement, returning a result set as a PDOStatement object
Ex:
$sql = 'SELECT DepartmentName, DepartmentID FROM de partment'; foreach ($dbh->query($sql) as $row) { print $row['DepartmentName'] . "\t"; print $row['DepartmentID'] . "\n"; }
13.2.4. Prepared Statement:
13.2.4.1. Using ':field' format:
$sql = 'INSERT INTO employee(LastName, DepartmentID ) VALUES(:name, :departmentid)'; $stmt = $dbh->prepare($sql);
$stmt->bindParam(':name', $name); $stmt->bindParam(':departmentid', $departmentId);
$name = 'Test1'; $departmentId = 35; $stmt->execute();
OR: $sql = 'INSERT INTO employee(LastName, DepartmentID ) VALUES(:name, :departmentid)'; $stmt = $dbh->prepare($sql); $stmt->execute(array(':name' => 'Test1',
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':departmentid' => 35));
13.2.4.2. Using '?' character: $sql = 'INSERT INTO employee(LastName, DepartmentID ) VALUES(?, ?)'; $stmt = $dbh->prepare($sql); $stmt->execute(array('Test1', 35));
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Chapter 14
Software
Engineering
Basic Keywords: UML, Use case, actor, diagram, software engineering,
relationship.
Subjects:
14.1. Requirement Gathering
14.2. Use-Case Diagram
14.3. Class Diagram
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14.1. Requirement Gathering:
14.1.1. General:
1. Where did you hear about us?
2. Do you have a domain name? If not, do you have ideas on one? If so, what is it?
3. What is your company name? Do you want to use the entire name on the site, logo, and graphics?
4. Do you have special features in mind like ECommerce shopping cart, BLOG, RSS, Forms with emails, EZine, Newsletter signup, autoresponders, advertising landing/call-to-action pages, etc.?
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14.1.2. Marketing:
1. Who is your intended audience? Are they regional, industry specific, company size specific, etc.?
2. Do you intend to provide a call to action - make a sale, call in to your office, fill out a form, etc?
3. Describe your ideal client and the specific attributes that we'll be targeting in the website.
4. What are your website expectations, main emphasis and primary goals - increased sales, increased leads, etc.? Please prioritize.
5. What separates your company from your competition and what do you expect will draw clients to the website?
6. How do you plan to market the website?
7. What company properties do you want to emphasize on the website? Please prioritize.
14.1.3. Identity:
1. Do you already have a logo and other graphics to be used? If not, do you want to have one created?
2. Have you identified a tagline?
3. What keywords do you want to be found by in the search engines?
14.1.4. Layout:
1. Please provide a list of websites that you like and don't like. Why do you or do you not like these sites?
2. Please provide a list of competitors' websites.
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3. Do you have ideas of the colors to be used, and colors you don't like? Please provide example sites.
4. Do you have an intended website screen size - 1024x768, 800x600, or stretch to the entire width of the screen?
5. If the site isn't the entire width of the screen do you have a preference for left or center alignment?
6. Do you have a horizontal or left-side vertical preference for the main navigation?
7. Please provide the main pages you need in the website.
8. Have you created the copy text for any of your pages?
9. Do you have existing business cards or other printed material we need to match?
10. Are you leaning towards custom drawn artwork or photographs?
14.2. Use-Case Diagram:
14.2.1. Introduction:
- The Use case diagram is used to identify the primary elements and processes that form the system. The primary elements are termed as "actors" and the processes are called "use cases." The Use case diagram shows which actors interact with each use case.
- A use case diagram captures the functional aspects of a system. More specifically, it captures the business processes carried out in the system
- Use case diagrams define the requirements of the system being modeled and hence are used to write test scripts for the modeled system.
14.2.2. Elements of Use Case diagram:
- Actor: An actor portrays any entity (or entities) that performs certain roles in a given system
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or
- Use Case: a visual representation of a distinct business functionality in a system
- System boundary: A system boundary defines the scope of what a system will be
14.2.3. Relationship in Use Case Diagram:
- Include: a use case includes the functionality described in the another use case as a part of its business process flow
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- Extend: In an extend relationship between two use cases, the child use case adds to the existing functionality and characteristics of the parent use case
- Generalization: The child use case in the generalization relationship has the underlying business process meaning, but is an enhancement of the parent use case
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14.2.4. UML Tools:
- Rational Rose (Commerce Software):
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- ConceptDraw
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-StarUML (Freeware):
14.2.5. Example:
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14.3. Class Diagram:
14.3.1. Introduction:
-By definition, a class diagram is a diagram showing a collection of classes and interfaces, along with the collaborations and relationships among classes and interfaces.
- A class diagram is a pictorial representation of the detailed system design
14.3.2. Elements of Class Diagram:
- Class: A class represents an entity of a given system that provides an encapsulated implementation of certain functionality of a given entity.
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- Interface: An interface on the other hand provides only a definition of business functionality of a system.
- Package: A package provides the ability to group together classes and/or interfaces that are either similar in nature or related. Grouping these design elements in a package element provides for better readability of class diagrams, especially complex class diagrams
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14.3.3. Relations between Classes:
- Association: When two classes are connected to each other in any way, an association relation is established
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- Aggregation: When a class is formed as a collection of other classes, it is called an aggregation relationship between these classes
- Inheritance/Generalization: Generalization is the basic type of relationship used to define reusable elements in the class diagram
- Realization: In a realization relationship, one entity (normally an interface) defines a set of functionalities as a contract and the other entity (normally a class) "realizes" the contract by implementing the functionality defined in the contract.
Chapter Exercise:
Draw the Use-case Diagram and Class diagram for an E-commerce website.
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Chapter 15
XML &
Web Service Keywords: XML, web service, parsing, element, root, attribute,
doctype, namespace, well-formed, valid, XPath, SimpleXML, SOAP, WSDL, JSON.
Subjects:
15.1. XML Basics
15.2. SimpleXML Class
15.3. Web Service Basics
15.4. SOAP
15.5. JSON Overview
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15.1. XML Basics:
15.1.1. Introduction:
− XML stands for Extensible Markup Language − XML is a markup language much like HTML − XML was designed to carry data, not to display data − XML tags are not predefined. You must define your own tags − XML is designed to be self-descriptive − XML is a W3C Recommendation
15.1.2. Well-formed XML:
15.1.3. Valid XML: Well-formed & follow Document Type Definition (DTD) or XML Schema(XSD):
15.1.3.1. Internal DTD:
<?xml version="1.0"?> <!DOCTYPE note [ <!ELEMENT note (to,from,heading,body)> <!ELEMENT to (#PCDATA)> <!ELEMENT from (#PCDATA)> <!ELEMENT heading (#PCDATA)> <!ELEMENT body (#PCDATA)> ]> <note> <to>Tove</to> <from>Jani</from>
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<heading>Reminder</heading> <body>Don't forget me this weekend!</body> </note>
15.1.3.2. External DTD:
<?xml version="1.0"?> <!DOCTYPE note SYSTEM "note.dtd"> <note> <to>Tove</to> <from>Jani</from> <heading>Reminder</heading> <body>Don't forget me this weekend!</body> </note>
"note.dtd" file: <?xml version="1.0"?> <!ELEMENT note (to,from,heading,body)> <!ELEMENT to (#PCDATA)> <!ELEMENT from (#PCDATA)> <!ELEMENT heading (#PCDATA)> <!ELEMENT body (#PCDATA)>
15.2. SimpleXML Class:
15.2.1. Load XML Data:
- Load an XML String:
$xmlstr = file_get_contents('book.xml'); $booklib = simplexml_load_string($xmlstr);
- Load an XML File:
$booklib = simplexml_load_file('book.xml');
- Load an XML String – using OOP:
$xmlstr = file_get_contents('book.xml'); $booklib = new SimpleXMLElement($xmlstr);
- Load an XML File – using OOP:
$booklib = new SimpleXMLElement('book.xml', NULL, t rue);
15.2.2. Simple Read XML Data:
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foreach($booklib->Book as $book) { echo $book['ISBN'] . "\n"; echo $book['title'] . "\n"; echo $book[author] . "\n\n"; }
15.2.3. Common SimpleXML Class Method:
Method Description addChild() Adds a child element to the XML node.
Ex: $magazine = $booklib ->addChild('magazine'); $magazine ->addChild('PCW', 'Mag for IT, Jun 09');
addAttribute() Adds an attribute to the SimpleXML element. Ex: $magazine ->addAttribute('size', 'big');
attributes() Returns element's attributes. Ex: foreach ($magazine->attributes() as $magAttr)
children() Finds children of given node. Ex: foreach($booklib ->children() as $book)
getName() Gets the name of the XML element. Ex: $tagName = $magazine ->getName();
xpath() Runs XPath query on XML data. Ex: $resul t =$booklib->xpath('/Books/Book/author');
15.2.4. Export XML Data:
- Output to XML string:
header('Content-type: text/xml'); echo $booklib->asXML();
- Save to XML file:
$booklib->asXML('mybook.xml');
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15.3. Web Service Basics:
15.3.1. Introduction:
− Web services are application components − Web services communicate using open protocols − Web services are self-contained and self-describing − Web services can be discovered using UDDI − Web services can be used by other applications − XML is the basis for Web services
15.3.2. Types of Using Web Services:
15.3.2.1. Reusable application-components:
- Reusable components. - Offer application-components. - Examples: Weather report, Map…
15.3.2.2. Connect existing software:
- Solve interoperability problem. - Link to exchange data between different applications and platforms.
15.4. SOAP:
15.4.1. Enable SOAP Extension in PHP5:
- Edit file PHP.INI, uncomment line extension for php_soap
15.4.2. Using non-WSDL Mode:
15.4.2.1. Soap Server:
class QuoteService { private $quotes = array("ibm" => 98.42); function getQuote($symbol) { if (isset($this->quotes[$symbol]))
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{ return $this->quotes[$symbol]; } else { throw new SoapFault("Server","Unknown Symbol
'$symbol'."); } } } $options = array('uri' => 'http://localhost/soap/se rver.php'); $server = new SoapServer(NULL, $options); $server->setClass("QuoteService"); $server->handle();
15.4.2.2. Soap Client:
$options = array( 'location' => http://localhost/soap/server.php', 'uri' => 'http://localhost/soap/'); $client = new SoapClient(NULL, $options); try { print($client->getQuote("ibm")); print($client->getQuote("microsoft")); } catch (SoapFault $exception) { echo 'Not Found'; }
15.4.3. Using WSDL Mode:
15.4.3.1. WSDL File:
<?xml version ='1.0' encoding ='UTF-8' ?>
<definitions name='StockQuote'
targetNamespace='http://example.org/StockQuote' xmlns:tns=' http://example.org/StockQuote ' xmlns:soap='http://schemas.xmlsoap.org/wsdl/soap/ ' xmlns:xsd='http://www.w3.org/2001/XMLSchema'
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xmlns:soapenc='http://schemas.xmlsoap.org/soap/en coding/' xmlns:wsdl='http://schemas.xmlsoap.org/wsdl/' xmlns='http://schemas.xmlsoap.org/wsdl/'>
<message name='getQuoteRequest'>
<part name='symbol' type='xsd:string'/> </message> <message name='getQuoteResponse'> <part name='Result' type='xsd:float'/> </message>
<portType name='StockQuotePortType'> <operation name='getQuote'>
<input message='tns:getQuoteRequest'/>
<output message='tns:getQuoteResponse'/> </operation>
</portType> <binding name='StockQuoteBinding' type='tns:StockQu otePortType'> <soap:binding style='rpc' transport='http://schemas.xmlsoap.org/soap/http '/>
<operation name='getQuote'> <soap:operation soapAction='urn:xmethods-delaye d-quotes#getQuote'/>
<input> <soap:body use='encoded' namespace='urn:xmeth ods-delayed-quotes' encodingStyle='http://schemas.xmlsoap.org/s oap/encoding/'/>
</input> <output> <soap:body use='encoded' namespace='urn:xmeth ods-delayed-quotes' encodingStyle='http://schemas.xmlsoap.org/s oap/encoding/'/> </output>
</operation> </binding>
<service name='StockQuoteService'>
<port name='StockQuotePort' binding='StockQuoteBi nding'> <soap:address location='http://localhost/soap/s erver.php'/> </port>
</service> </definitions>
15.4.3.2. Soap Server:
class QuoteService { private $quotes = array("ibm" => 98.42); function getQuote($symbol) { if (isset($this->quotes[$symbol])) { return $this->quotes[$symbol]; } else {
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throw new SoapFault("Server","Unknown Symbol '$symbol'.");
} } } $server = new SoapServer("stockquote.wsdl"); $server->setClass("QuoteService"); $server->handle();
15.4.3.3. Soap Client:
$client = new SoapClient("stockquote.wsdl"); try { print($client->getQuote("ibm")); print($client->getQuote("microsoft")); } catch (SoapFault $exception) { echo 'Not Found';
}
15.5. JSON Overview:
15.5.1. Introduction:
{"menu": { "id": "file", "value": "File", "popup": { "menuitem": [ {"value": "New", "onclick": "CreateNewDoc()"} , {"value": "Open", "onclick": "OpenDoc()"}, {"value": "Close", "onclick": "CloseDoc()"} ] } }}
15.5.2. Using JSON in PHP:
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15.5.2.1. json_encode() : returns the JSON format of a variable.
Ex:
$arr = array ('a'=>1,'b'=>2,'c'=>3,'d'=>4,'e'=>5); echo json_encode($arr);
// Displays '{"a":1,"b":2,"c":3,"d":4,"e":5}'
15.5.2.2. json_decode() : decodes a JSON string. Ex:
$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}'; var_dump(json_decode($json)); var_dump(json_decode($json, true));
// Displays object(stdClass)#1 (5) { ["a"] => int(1) ["b"] => int(2) ["c"] => int(3) ["d"] => int(4) ["e"] => int(5) } array(5) { ["a"] => int(1) ["b"] => int(2) ["c"] => int(3) ["d"] => int(4) ["e"] => int(5) }
15.5.3. XML vs. JSON:
XML Format:
<menu id="file" value="File"> <popup> <menuitem value="New" onclick="CreateNewDoc()" /> <menuitem value="Open" onclick="OpenDoc()" /> <menuitem value="Close" onclick="CloseDoc()" /> </popup> </menu>
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Chapter Exercise:
A> Write a Webpage simple SOAP service to simulate a calulator with operator: +, -, *, / and write an client using that service. In client side, user input 2 number in HTML form and click submit, your script will use calculator service to calculate the result and response for user.
Example: $sum = $client->plus($_GET['first'], $_GET['second']); B> Use SimpleXML to read RSS Feeds from a news website (ex:tuoitre, vnexpress…) and
displays into your website.
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Chapter 16
Security Keywords: security, hack, attacker, password, register globals, exploit,
input, whitelist, blacklist, filtering, sanitize, escape, hashing, spoof, XSS, CSRF, SQL Injection, information leakage, command Injection, user agent, risk, vulnerable, validate, session fixation, hijacking, identifier, privilege, remote code injection, safe mode.
Subjects:
16.1. Security Basics
16.2. Database Security
16.3. Website Security
16.4. Session Security
16.5. File System Security
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16.1. Security Basics:
16.1.1. Why consider security?
16.1.2. Core PHP security theory:
- know the mechanism of HTTP model
- Check PHP configuration
- Hide important data
- Filter User input data
16.2. Database Security:
16.2.1. SQL Injection:
� Solution:
- Prevent unauthorized access
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- Limit the permissions.
- Filter user input
- Using prepared statements
- Hide database errors.
16.2.2. Information Leakage:
Fatal error : Uncaught exception 'PDOException' with message 'SQLSTATE[28000] [1045] Access denied for user 'root'@'localhost' (using password: YES)' in D:\AppServ\www\phpa\index.php(492) : eval()'d code:1 Stack trace: #0 D:\AppServ\www\phpa\index.php(492) : eval()'d code(1): PDO->__construct('mysql:host=loca...', 'root', 'rooat') #1 D:\AppServ\www\phpa\index.php(492): eval() #2 {main} thrown in D:\AppServ\www\phpa\index.php(492) : eval()'d code on line 1
���� Solution:
- Configure right setting for logging, display error - Catch exception when error
16.3. Website Security:
16.3.1. Weak Authentication:
- Weak Password
- Guessing Files & Directories
- People
���� Solution:
- Strong password
- Set Access-Rule for files, directories
- Publish files/directories when needed.
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- Notice to file/directory name convention
- Keep your secret
16.3.2. Using bad libraries, components, plug-ins:
- Open-source projects
- Free-proviced scripts, libraries, components, plug-ins, widgets…
- Discussion Board (forum…)
- "Bad" books
- "Bad" people.
���� Solution:
- Check bugs before using.
- Check the source of scripts, libraries, plug-ins, widgets…
- Check the reviews of others scripts.
- Write your own code when needed.
16.3.3. DoS – DDoS - SPAM:
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���� Solution:
- Using Session to limit the actions on the website
- User Authentication
- Redirect & Authentication
- Track IP
- Check User-Agent
- Using CAPTCHA
- Use lower level system security (Clustering & Load balance, IDS, IPS, Bandwidth management)
16.3.4. Cross Site Scripting - XSS :
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View Animation: http://www.virtualforge.de/vmovie.php
���� Solution:
- Filter All Input
- Escape All Output
- Only Allow Safe Content
16.3.5. Cross Site Request Forgery – CSRF :
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View Animation: http://www.virtualforge.de/vmovie.php
���� Solution:
- Use POST methods
- Require Verification for important actions
- Use an Anti-CSRF Token.
- Limit the external link resource(images, scripts…) submitted by users
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16.4. Session Security:
16.4.1. Session Fixation:
� Solution:
- Correct Configuration (do not accept external SIDs, set time-out..) - Perform session id regeneration, support log-out, reject illegal referrers… Ex:
if (strpos($_SERVER['HTTP_REFERER'], 'https://DiD/' ) !== 0 || isset($_GET['LOGOUT']) || $_SERVER['REMOTE_ADDR'] !== $_SESSION['PREV_REM OTEADDR'] || $_SERVER['HTTP_USER_AGENT'] !== $_SESSION['PREV _USERAGENT']) session_destroy(); session_regenerate_id(); // generate a new session identifier $_SESSION['PREV_USERAGENT'] = $_SERVER['HTTP_USER_A GENT']; $_SESSION['PREV_REMOTEADDR'] = $_SERVER['REMOTE_ADDR'];
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16.4.2. Session Hijacking:
� Solution:
- Using HTTPS on sensitive areas
- Check various request headers sent by the client (User-Agent, IP, referrer header)
Ex: // After a successful login, store the User-Agent i nto the session: $_SESSION['user_agent'] = $_SERVER['HTTP_USER_AGENT '];
// On subsequent page loads, check to ensure User-A gent // not change. If its has changed, then that is cau se
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// for concern, and the user should log in again if ($_SESSION['user_agent'] != $_SERVER['HTTP_USER_ AGENT'])
{ // Force user to log in again exit; }
16.5. File System Security:
16.5.1. File Including Injection:
� Solution:
- Check the path of included file - Filter file name
16.5.2. Command Injection:
� Solution:
- Disable unuse functions using directives in PHP.INI file( directive disable_functions, disable_classes)
- Using escape function: escapeshellcmd(), escapeshellarg().
- Avoid the use of shell commands.
- Avoid the use of client input to construct dynamic shell commands.
16.5.3. Shared Hosting , Local Attack:
� Solution:
- Limit the access to your files/directories
- Using open_basedir, disable_functions, disable_classes directives in PHP.INI
Ex:
; Disable functions disable_functions = exec,passthru,shell_exec,syste m
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; Disable classes disable_classes = DirectoryIterator,Directory
Chapter Exercise:
A> Check security for all your projects. B> Using CAPTCHA function for register user page in your projects.
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Chapter 17
Advanced
PHP Topics Keywords: config, section, directive, date, time, email, phpmailer, gd,
image, color, curl, smarty, template engine.
Subjects:
17.1. PHP.INI File Overview
17.2. Date & Time
17.3. Email Sending
17.4. Image Processing
17.5. cURL Library
17.6. Smarty
17.7. Different between PHP5 & PHP4
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17.1. PHP.INI File Overview:
17.1.1.Introduction:
- is a PHP configuration file, controls some of the settings of the PHP interpreter.
- Use this code to view the contents of php.ini
<?php phpinfo(); ?>
- On Linux, php.ini may be located in:
/etc/php.ini /etc/php/php.ini
/etc/php5/php.ini /usr/bin/php5/bin/php.ini
- On Windows, php.ini may be located in:
C:\WINDOWS\php.ini
17.1.2.Directives:
- Directive is a setting for a function/system when running PHP script.
- Each directive in php.ini usually has comment. Comment lines begin with comma (,)
- You can disable some directives by inserting comma to begin of line, PHP will use the default value for disabled directives.
- Format: directive_name = directive_value
- Ex:
short_open_tag = On post_max_size = 80M
17.1.3. Sections:
- Group php.ini directives together.
- Format: [SECTION_NAME]
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- Ex:
[PHP] [MySQL] [Session]
17.1.4. Some important directives:
- error_reporting, display_errors, register_globals, post_max_size,
magic_quotes_gpc, upload_max_filesize, extension
17.2. Date & Time:
17.2.1. Get the current date & time:
- The simplest and most basic thing you'll want to do with PHP's date API is, obviously, get the current date and time. This is best accomplished via the getdate() function, which returns an associative array containing date and time information.
- Ex:
$today = getdate(); print_r($today);
// Displays
Array ( [seconds] => 40 [minutes] => 58 [hours] => 21 [mday] => 17 [wday] => 2 [mon] => 6 [year] => 2003 [yday] => 167 [weekday] => Tuesday [month] => June [0] => 1055901520 )
17.2.2. Timestamp Introduction:
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- Most of PHP's date functions work on the basis of timestamps. This timestamp is a unique numeric representation of a particular date, calculated as the number of seconds between January 1 1970 and the date and time specified, and makes it easier to perform arbitrary calculations on date and time values.
- In PHP, UNIX timestamps are created via the mktime() function, which accepts a series of date and time parameters, and converts them into a timestamp
- Ex:
echo mktime(14, 35, 20, 4, 1, 2002);
//displays 1017651920
- You can obtain a timestamp for the current moment in time by calling mktime() with no arguments:
- you can also use the time() function, which returns the current timestamp
17.2.3. Format date/time output:
- Once you've got yourself a timestamp, you can use the date() function to format it.
- This date() function is easily one of the most useful functions in this collection
Ex:
echo "It is now " . date("h:i d M Y", mktime());
- Common format characters of date() function (view full list at http://php.net/date):
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17.3. Email Sending:
17.3.1. Using function mail() from PHP:
$to = '[email protected]'; $subject = 'the subject'; $message = 'hello'; $headers = 'From: [email protected]' . "\r\n" . 'Reply-To: [email protected]' . "\r\n" . 'X-Mailer: PHP/' . phpversion(); mail($to, $subject, $message, $headers);
17.3.2. PHPMailer Class:
- Download class at: http://phpmailer.worxware.com/
require("phpmailer/class.phpmailer.php"); //change settings here
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$your_email = "[email protected]"; $your_smtp = "mail.example.com"; $your_smtp_user = "[email protected]"; $your_smtp_pass = "example_password"; $your_website = "http://example.com"; //get contact form details $name = $_POST['name']; $email = $_POST['email']; $url = $_POST['url']; $comments = $_POST['comments']; $response="Name: $name\nContents:\n$comments\n"; $mail = new PHPmailer(); $mail = $mail->SetLanguage("en", "phpmailer/languag e"); $mail->From = $your_email; $mail->FromName = $your_website; $mail->Host = $your_smtp; $mail->Mailer = "smtp"; $mail->Password = $your_smtp_pass; $mail->Username = $your_smtp_user; $mail->Subject = "$your_website feedback"; $mail->SMTPAuth = "true"; $mail->Body = $response; $mail->AddAddress($your_email,"$your_website admin" ); $mail->AddReplyTo($email,$name); echo "<p>Thanks for your feedback</p>"; if (!$mail->Send()) { echo "<p>Send Email Error. Try again later!</p>"; } $mail->ClearAddresses(); $mail->ClearAttachments();
17.4. Image Processing:
17.4.1. GD Library Introduction:
- The GD library is used for dynamic image creation. From PHP we use with the GD library to create GIF, PNG or JPG images instantly from our code. This allows us to do things such as create charts on the fly, created an an anti-robot security image, create thumbnail images, or even build images from other images.
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17.4.2. Useful Image Functions:
Function Description imagecreate() Creates a blank image resource of the specified size. imagecreatefromgif() Creates an image resource from the specified GIF format file. imagecreatefro mjpeg() Creates an image resource from the specified JPEG format file. imagecreatefrompng() Creates an image resource from the specified PNG format file. imagesx() Returns the image's width
imagesy() Returns the image's height
imagegif() Output a GIF image to browser or file
imagejpeg() Output a JPEG image to browser or file
imagepng() Output a PNG image to browser or file
imagedestroy() Destroy an image resource, free up memory
imagecopy() Copy part of an image
imagecopymerge() Copy and merge part of an image
imagecopyresampled() Copy and resize part of an image with resampling
17.4.3. Example:
// File imagethumb.php // Capture GET parameters
$source_file = $_GET['image']; $new_width = $_GET['width']; $new_height = $_GET['height']; // Open source image file and get image dimensions $old_image = imagecreatefromjpeg($source_file); $old_width = imagesx($old_image); $old_height = imagesy($old_image); // Create blank image $new_image = imagecreatetruecolor($new_width,$new_h eight); // Copy and resize old image into new image resourc e and then return to browser imagecopyresized($new_image,$old_image,0,0,0,0,$ne w_width,$new_height,$old_w idth,$old_height); header('Content-type: image/jpeg'); imagejpeg($new_image);
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Called with: <img src="imagethumb.php?image=test.jpg&width=100&h eight=75" />
17.5. cURL Library:
17.5.1. cURL Introduction:
- The cURL extension to PHP is designed to allow you to use a variety of web resources from within your PHP script
- It lets you use several web protocols using one uniform interface, most notably FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, and LDAP.
- The basic premise to using Curl is that there are four steps: initialize cURL, set your options, execute your query, and close Curl.
- Curl is very configurable, and there are dozens of options you can set to make it do all sorts of things.
17.5.2. Using cURL:
$ch = curl_init(); curl_setopt($ch,CURLOPT_URL,"http://example.com/log in.php");
curl_setopt($ch, CURLOPT_REFERER, "http://www.googl e.com/"); curl_setopt($ch, CURLOPT_USERAGENT, "MozillaXYZ/1.0 "); curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, "Username=johndoe&Password=1234&Submit=Go%21"); $result = curl_exec ($ch); curl_close($ch);
17.6. Smarty:
17.6.1. Smarty Introduction:
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- Written in PHP - Is a Template Engine - Many features:
. No parsing overhead
. Extensible : functions, modifiers…
. Control statements
. Can embed php code in template
. Caching
. Output filtering
17.6.2. Using Smarty:
- Installation: download at http://www.smarty.net/
- File structure:
/ www. example . com/ smarty / Smarty . class . php
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Smarty_Compiler . class . php Config_File . class . php debug . tpl internals /*.php plugins/*.php /www.example.com/ smarty/ templates/ templates_c/ configs/ cache/
17.6.3. Example:
require 'Smarty.class.php'; $smarty = new Smarty; $smarty->assign('Username', 'John Doe'); $smarty->display('index.tpl');
- index.tpl file
<html> <body> Welcome {$Username} </body> </html>
17.7. Different between PHP5 & PHP4:
17.7.1. Language Features:
- allows limited type hinting.
- foreach support by-reference declaration
- A number of new functions, particularly for string and array manipulation
17.7.2. OOP:
- all objects are passed by reference
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- defines constant within the scope of a class
- class methods and properties support visibility: public, private, protected
- using clone mechanism to copy objects.
- using __construct() and __destruct()
- interfaces and abstract classes
- lazy loading using __autoload()
17.7.3. New Extensions:
- SimpleXML, DomXML
- PHP Data Object (PDO)
- Standard PHP Library(SPL)
- Reflection extension
17.7.4. Error Management:
- Classes support exceptions
- E_STRICT error reporting level : emit notices when legacy or deprecated code is encountered.
Chapter Exercise:
Using image functions to enhanced the photo editing page of current project. Ex: resize, crop, create thumbnail, add watermark…
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Chapter 18
Design Pattern Keywords: design, singleton, factory, strategy, MVC, Model-View-
Controller, business logic, presentation, request, response.
Subjects:
18.1. Fundamentals
18.2. Singleton Pattern
18.3. Factory Pattern
18.4. Strategy Pattern
18.5. Model-View-Controller (MVC) Pattern
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18.1. Fundamentals:
18.1.1. Design Pattern Theory:
- In software engineering, a design pattern is a general repeatable solution to a commonly occurring problem in software design.
- It is a description or template for how to solve a problem that can be used in many different situations.
18.1.2. Popular Design Patterns:
18.1.2. 1. Creational design patterns: is all about class instantiation. Ex: Abstract Factory, Builder, Factory, Object Pool, Prototype, Singleton…
18.1.2.2. Structural design patterns: about Class and Object composition. Ex: Adapter, Bridge, Composite, Decorator, Façade, Flyweight, Private Class Data, Proxy…
18.1.2.3. Behavioral design patterns: about Class's objects communication. Most specifically concerned with communication between objects. Ex: Chain of responsibility, Command, Interpreter, Iterator, Null Object, Observer, Strategy…
18.2. Singleton Pattern:
18.2.1. Singleton Pattern Introduction:
- Ensure that only one instance of a class is created and provide a global access point to the object.
- Singleton pattern should be used when we must ensure that only one instance of a class is created and when the instance must be available through all the code. A special care
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should be taken in multithreading environments when multiple threads must access the same resources through the same singleton object.
- There are many common situations when singleton pattern is used: - Logger Classes - Configuration Classes - Accessing resources in shared mode
18.2.2. Implement Singleton Pattern in PHP:
class Singleton { protected static $_instance; // don't permit an explicit call of constructor! protected function __construct(){ } public static function getInstance() { if( self::$_instance === NULL ) self::$_instance = new self(); return self::$_instance; } }
18.3. Factory Pattern:
18.3.1. Factory Pattern Introduction:
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- Creates objects without exposing the instantiation logic to the client and refers to the newly created object through a common interface.
- Factory pattern should be used when: - a framework delegate the creation of objects derived from a common superclass to the factory - we need flexibility in adding new types of objects that must be created by the class
- Along with singleton pattern the factory is one of the most used patterns. Almost any application has some factories.
18.3.2. Implement Factory Pattern in PHP:
interface IProduct { function calWeight(); function say(); } class ProductLaptop implements IProduct { function calWeight(){} function say() { echo 'I am a laptop'; }
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} class ProductDesktop implements IProduct { function calWeight(){} function say(){} } class ProductFactory { const PROD_DESK = 1; const PROD_LAP = 2; public static function getProduct($type = self::PR OD_LAP) { switch($type) { case self::PROD_DESK : return new ProductDesktop(); break; case self::PROD_LAP : return new ProductLaptop(); break; default: throw new Exception('Not found.'); } } } $obj = ProductFactory::getProduct(ProductFactory::P ROD_LAP); $obj->say();
18.4. Strategy Pattern:
18.4.1. Strategy Pattern Introduction:
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- Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from the clients that use it.
- Capture the abstraction in an interface, bury implementation details in derived classes.
18.4.2. Implement Strategy Pattern in PHP:
interface IStrategy { function getPoint($point = 0); } class StrategyHappy implements IStrategy { function getPoint($point = 0) { return ++$point; } } class StrategySad implements IStrategy { function getPoint($point = 0) { return --$point; } } class Student { private $point;
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function __construct($point = 0) { $this->point = $point; } function tellPoint($strategy) { $newPoint = $strategy->getPoint($this->point); echo 'My point is ' . $newPoint; } } $studentA = new Student(9); $studentA->tellPoint(new StrategyHappy()); $studentB = new Student(9); $studentB->tellPoint(new StrategySad());
18.5. Model-View-Controller (MVC) Pattern:
18.5.1. MVC Pattern Introduction:
- Model–view–controller (MVC) is an architectural pattern used in software engineering. Successful use of the pattern isolates business logic (or other program logic) from the user interface, permitting one to be freely modified without affecting the other.
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- The Model is how your data is going to be represented. This is usually in the form of a relational database (MySQL).
- We use a Controller to interact and query the data within the Model layer. The controller also sends data to the view. Some people refer to the Controller as the business logic within a software system.
- The View is a way to represent or serve up the data manipulated by the controller from the model. The view is typically what the end user interacts with, often times in the form of a web page.
18.5.2. MVC Framework Overview:
- Some popular PHP MVC Framework: Framework PHP
Ver. Multiple DB ORM Template Cache Validation Ajax
CakePHP 4 , 5 x x x x x CodeIgniter 4 , 5 x x x x Prado 5 x x x x x x Symfony 5 x x x x x Zend 5 x x x x x - Multiple DB: Indicates whether the framework supports multiple databases without having
to change anything.
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- ORM: Indicates whether the framework supports an object-record mapper, usually an implementation of ActiveRecord.
- Template: Indicates whether the framework has an inbuilt template engine.
- Cache: Indicates whether the framework includes a caching object or some way other way of caching.
- Validation: Indicates whether the framework has an inbuilt validation or filtering component.
- Ajax: Indicates whether the framework comes with inbuilt support for Ajax.
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Chapter 19
E-Commerce
Website Keywords: ecommerce, shopping cart, payment, order, optimization,
search engine, SEO, backend, frontend, web analytic, google.
Subjects:
19.1. E-Commerce Fundamentals
19.2. Website Optimization
19.3. SEO Basics
19.4. Website Analytic – Google Analytic
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19.1. E-Commerce Fundamentals:
- consists of the buying and selling of products or services over electronic systems such as the Internet and other computer networks.
- Features of an ecommerce website:
• Online Shopping Cart
• Secure Credit Card Facility (SSL)
• Online Payment Option
• Offline Payment Options
• Payment Gateway Interface
• Member Accounts
• Subscription Options
• Customised Data Collection & Reporting
• Multiple Currencies
• Automated Electronic Invoice & Receipts System
• Freight Management
• Order Management
• Integration with Inventory Management & Accounting Systems
• Integration with Email Marketing Systems
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19.2. Website Optimization:
19.2.1. Front-end Optimization:
19.2.2. Back-end Optimization:
- Code Optimize
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- Query Optimize
- Caching
19.3. SEO Basics:
19.3.1. Introduction:
- Short for search engine optimization, the process of increasing the amount of visitors to a Web site by ranking high in the search results of a search engine. The higher a Web site ranks in the results of a search, the greater the chance that that site will be visited by a user. It is common practice for Internet users to not click through pages and pages of search results, so where a site ranks in a search is essential for directing more traffic toward the site.
- SEO helps to ensure that a site is accessible to a search engine and improves the chances that the site will be found by the search engine.
19.3.2. Some SEO Techniques:
1. The Meta Keywords, Description and Robots tag — Google used description copy to market your site in its results, treat this as optimized sales copy. Make sure your sitemap.xml page is CONSTANTLY called up to the search engines
2. The Title Tag - The MOST important aspect of on-page SEO, just take our word for it.
3. The Body Text (focus on the body text in bold, for this denotes strong emphasis to the search engines)
4. The first sentence in the body text and the first words used per sentence are the most important ones for advanced on-page SEO necessities (Make it humanly readable and SE readable — The words used in the first sentence are most important due to the implementation of Google’s LSI algorithm)
5. The URL — The subdirectory folder and page of content should be SEO’d (i.e. http://domain.com/real-estate/real-estate-marketing-ideas.com would fetch a high ranking for a page dedicated to real estate marketing ideas - especially with many highly authoritative, relevant, deep in-bound links)
6. The H1 and H2 Texts are highly important - Why? They show the search engine the main subjects and Table of Contents for the content to be indexed. Make these keyword friendly and reflective of your page’s title tag.
7. Same Site Link Texts — The links connecting the pages of your site together must have your targeted keyword terms in them as well as all links throughout the site
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— even though it seems excessive, having variations to your targetted keywords would also help when linking out to other pages within your site.
8. Same-Site Link URLs — Not only should you be using your keywords to describe pages within your site, those URLs you link to must have SEO URLs ( eg: http://domain.com/your-keyword.html)
9. Outbound Link Text — Resources you link to must be SEO’d - If you are an internet marketing site and are linking to an email marketing company (email marketing software in this instance), you would use “Put your internet marketing on auto-pilot and use the best tool for internet marketers today - internet marketing email software. Then just use other variants to internet marketing.
10. IMG Alt Tags — Your images should be described via ALT Tags with the keywords you are optimizing for - If your image is hosted on your web-host, the file name of the images should also be SEO’d — If you have an image about polar bears have it be polar-bear.jpg in your images folder.
11. Keyword Density — 8% is excellent and doesn’t seem spammy, if you have a 500 word article, then 40 of those words should have variances of the search term you are targeting, if this seems excessive, lower the keyword density down to 5% and you will only need to add 25 variances/instances of your keyword. And that’s just a start… (Keyword prominence is big, but not worth a discussion).
12. Lastly and surprisingly, Your HTML comments should have your SEO terms in them (!!) — As a question to the relevancy this has to your ranking, I am unsure, but most of the large sites have html comments connected to their search terms. If you end up doing an analysis of your on-page content, you can find out if the high ranked sites for your keyword use HTML comments tagged to the keyword(s) being targeted.
19.4. Website Analytic – Google Analytic:
- Google Analytics is one of the best tools out there for analyzing traffic on your website.
19.4.1. Setup Account:
1. Go to Google Analytics.
2. If you do not have a Google account, click Sign Up Now, to the left of the sign-in box. This will take you to a page where you can sign up for a Google account.
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3. If you have a Google account, use your email address and password to sign in.
4. Click the Sign Up button to continue.
5. In the next window, provide Google with the URL of the site you wish to analyze.
6. Give the site an account name that is easy to remember. If you will be tracking multiple sites, this is especially important.
7. Select the country your site is based in, or the country it is serving. Then select the appropriate time zone.
o If your site is based in India but all your users are in the U.S., you may want to select a U.S. time zone to figure out when in their day most choose to use your
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site - or you may want to set it to your city's time zone to see when you need the most workers on staff.
8. Click Continue.
9. In the next window, provide your contact information.
10. Click Continue.
11. In the next window, read the Google Analytics terms of service. If you agree with them, click the Yes box.
12. Click Create New Account.
13. Google will provide you with a block of code. Copy this - you'll need to insert it into your web site.
19.4.2. Embed Google Analytics JavaScript Into Pages
1. Find the </body> tag at the very bottom, just above the </html> page.
2. Do you see the code urchinTracker(), utmLinker(), utmSetTrans(), or utmLinkPost() above the </body> tag? If so, you must paste the Google Analytics Javascript above that code. If not, paste it immediately above the </body> tag.
3. If you have templates, insert the code into them as well.
4. Once you have uploaded the pages back to your site, you can begin tracking information!
19.4.3. WebSite Analytic
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1. Log in to Google Analytics.
2. In the center of the page is a section titled Website Profiles. Click on the View Reports link to the right of the name of the site you're interested in. This will bring you to the Dashboard.
3. At the top of the page is a chart that gives a visual representation of your site traffic over the past month.
o This chart will only give you data from the time you inserted the tracking code into your pages.
o If you want to change the span of time the chart displays, click on the dates in the upper right-hand corner. Click on dates in the calendar that is revealed or manually type in dates to view a different span of time.
o To compare traffic over two different time periods, select one date range you want to use, click Compare to Past, and select the range you wish to compare it against.
o Just below the dates is a menu that says Visits. Click on it to change the graph to pageviews (how many times the pages on your site have been viewed), pages per visit (how many pages on your site users visited on average), average time on site (how long each user spent on your site), bounce rate (what percentage of
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users left after visiting only one page), or percentage of new visits (how many visitors had never been to your site before).
4. Immediately beneath that chart, you'll see a header that says Site Usage, with six small charts underneath. Under Site Usage, you'll find quick information on various site traffic statistics for the time period shown in the main chart. Each one has an individual chart.
o Visits tells you how many visits there were to your page. A visit is defined as a page view when that user has viewed no other page on your site in the past half hour.
o Pageviews tells how many times the pages on your site have been viewed.
o Pages/visit tells how many pages, on average, users view when they come to your site.
o Bounce Rate tells what percentage of users left after viewing only one page on your site.
o Avg. Time on Site shows how long each user spent on your site.
o New Visits shows what percentage of your users have not visited your site before.
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5. The Visitors Overview graph shows how many visitors have come to your site.
o This number is usually lower than the Visits statistic, sometimes a lot lower, because some visitors may visit your site over and over again.
o Click on View Report to view more detailed information about your visitors.
6. "Map Overlay" displays what countries your visitors are coming from.
o The darker the green, the more visitors come from that country.
o Click View Report to get in-depth information on where your visitors come from.
7. Traffic Sources Overview shows which percentage of users are getting to your site by typing your URL directly into their browser, and via search engines, referring sites, and other avenues such as emailed links.
o Click on View Report to get breakdowns of exactly what places your users are coming from, and what keywords they're looking for.
8. Content Overview specifies the top five most viewed pages over the time period you're looking at.
o Click on the name of any page to get extremely detailed information about where the people viewing that page came from, how long they spent on the page, how many of them were new to the page, and a lot more.
o Click on View Report to get access to information about the performance of all pages on the site.
19.4.4. See How Website Site Is Performing Daily and Hourly
1. In the menu to the left, click on the word Visitors.
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2. To the left beneath the main chart, you'll see a number of different statistical breakouts.
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3. Click on any of the words to get a bar-chart breakout of the daily performance for that aspect of site traffic measurement.
4. If you want to learn hour-by-hour trends, click on the word Hourly above the bar chart to see an hour by hour graph for the time period at hand.
5. To compare two different time periods, click on the dates above the line graph. Select the first set of dates you want to work with, check the Compare to Past box, click on the second set of dates, and click the Apply Range button.
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19.4.5. See Where Your Traffic Comes From
1. In the lower right-hand corner of the Dashboard you'll find your site's top 5 most-accessed pages. Click on any of these.
2. Below the chart on the right hand side, you will see a heading labeled Landing Page Optimization. Click on the link beneath it labeled Entrance Sources.
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3. Beneath the chart, you'll see a table. This table lists all the places your users came from to visit your site.
o In the first column to the right of the source name is the number of pageviews your page received from that source.
o The next column tells how many of those were unique pageviews - someone coming to your page who had not been to that page before in the time frame you're reviewing.
o Time on Page tells you how much time, on average, users from that particular source spent on the page in question.
o Bounce Rate shows how many people from that specific source left your site after looking at that page, without viewing another page.
o % Exit shows how many people from that specific source went to another site from that page. (This number may be lower than the Bounce Rate number; if they close the window or shut down their browser, it is not considered exiting.)
o When you set up certain financial measurements in the Goals section, Google will crunch the numbers to show you how much return you're getting with the $ Index column.
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4. If you want to get information on other pages, under the Content menu on the right, click on the Content by Title menu item. You can now go through all of your content to learn information on every page!
5. Return to the main dashboard by clicking on the word Dashboard in the upper-left corner.
Course Project:
Write a complete e-commerce website with:
Function requirement:
1. Support Shopping cart
2. Email ordering
3. Have Administration Control Panel
4. Have User registration/login/forgot password function
5. User can manage orders if logins, purchases products and checks out.
6. Security website
7. SEO
Coding requirement:
1. Using MVC Framework (OOP)
2. Using PDO
3. Using Smarty
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Chapter 20
Zend PHP 5
Certification
- ZCE Keywords: zce, zend, test, vulcan, mock test, exam, engineer,
certification, certified, Pearson Vue, Yellow page.
Subjects:
20.1. Zend Certification Introduction
20.2. Zend PHP 5 Certification Exam
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20.1. Zend Certification Introduction:
20.1.1. Zend Certification Type:
- Zend PHP 5 Certification - Zend Framework Certification
20.1.2. PHP Yellow Pages:
20.1.3. Zend Certificate
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ZCE Logo
20.2. Zend PHP 5 Certification Exam:
20.2.1. PHP Exam Contents:
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20.2.2. Exam Information :
- Tesing Center: Pearson VUE
- Price: $125
- 70 questions with 3 types:
− A multiple-choice question with only one right answer.
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− A multiple-choice question with multiple correct answers.
− A free-form question for which the answer must be typed in.
- Test duration: 90 minutes
20.2.3. Exam Practice Resources :
- PHP Manual
- Books
- Mock Test
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Good luck!
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Further Reading:
1. Core PHP programming, 3rd Edition (Prentice Hall 2003) – Leon Atkinson, Zeev Suraski
2. PHP 5 for Dummies (For Dummies 2004) - Janet Valade.
3. Object-Oriented Programming with PHP5 (Packt Publishing 2007) - Hasin Hayder.
4. Beginning PHP 5 and MySQL E-Commerce : From Novice to Professional (Apress 2004) - Cristian Darie, Mihai Bucica.
5. Professional PHP 6 (Wrox 2009) - Ed Lecky Thompson, Steven D. Nowicky, Thomas Myer.
6. Advanced PHP Programming (Sams 2004) - George Schlossnagle.
7. Learning PHP Data Objects (Packt Publishing 2007) - Dennis Popel.
8. Smarty PHP Template Programming and Application (Packt Publishing 2006) - Joao Prado Maia, Hasin Hayder, Lucian Gheorghe.
9. Head First Design Patterns (O'Reilly 2009) - Elisabeth Freeman, Eric Freeman, Bert Bates, Kathy Sierra.
10. Php|architect's Guide to PHP Design Patterns (php|architech 2005) - Jason E. Sweat.
11. MySQL, 4th Edition (Addison Wesley 2008) - Paul Dubois.
12. Professional Web 2.0 Programming (Wiley Publishing 2007) - Eric van der Vlist, Alessandro Vernet, Erik Bruchez, Joe Fawcett, Danny Ayers.
13. The Essential Guide to CSS and HTML Web Design (friends of ED 2007) – Craig Grannell
14. Pro CSS Techniques (Apress 2006) - Jeff Croft, Ian Lloyd, Dan Rubin.
15. Javascript Bible, 6th Edition (Wiley Publishing 2007) – Danny Goodman, Michael Morrison
16. Learning jQuery (Packt Publishing 2007) - Jonathan Chaffer, Karl Swedberg.
17. Search Engine Optimization : An Hour a Day (Wiley Publishing 2006) - Jennifer Grappone, Gradiva Couzin.
18. Head First Software Development (O'Reilly 2008) - Dan Pilone, Russ Miles.
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19. How to Break Web Software (Addison-Wesley Professional 2006) - Mike Andrews, James A. Whittaker.
20. HTTP Essential Protocols for Secure, Scaleable Web Sites (John Wiley & Sons 2001) - Stephen A. Thomas.
Useful Websites:
1. http://php.net/
2. http://talks.php.net/
3. http://zend.com/
4. http://www.smarty.net/
5. http://www.phpdeveloper.org/
6. http://www.phpclasses.org/
7. http://phpbuilder.com/
8. http://mysql.com/
9. http://www.w3schools.com/
10. http://developer.yahoo.com/
11. http://www.google.com/webmasters/
12. http://www.seomoz.org/
13. http://www.smashingmagazine.com/
14. http://templatemonster.com/
15. http://jquery.com/
16. http://www.alistapart.com/
17. http://www.cssplay.co.uk/
18. http://knowfree.net/
19. http://ha.ckers.org/
20. http://www.riapedia.com/
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Textbook Author: Full Name: Vo Duy Tuan
Email: [email protected]
Phone: 0938 916 902
Website: http://bloghoctap.com/
