Intro to LAMP Programming Presented for CIS Faculty at SAC by Dan Zollars.

Intro to LAMP ProgrammingIntro to LAMP Programming

Presented for

CIS Faculty at SAC

by

Dan Zollars

What is LAMP?What is LAMP?

LinuxApacheMySQLPHP

Number one HTTP server on the Internet

Most popular open-source database

Widely used, general purpose scripting language

Getting StartedGetting Started

Website resources – see http://cis.sac.accd.edu/~dzollars, then LAMP demo

Need only vi editor and browser – working directly on sol using programs already set up

Put programs in public_html under personal directory

http://cis.sac.accd.edu/~dzollars

TopicsTopics

Testing Apache & PHP

Integrating PHP and HTML

Targeting a PHP script from an HTML form

Retrieving information from MySQL databases

Accessing MySQL databases from PHP

Practice

Testing Apache & PHPTesting Apache & PHP

In browser: http://cis.sac.accd.edu/~yourname

Any document in public_html is available for Apache to serve to client (even if no link)

/home/yourname/public_html/sample.html <--> http://cis.sac.accd.edu/~yourname/sample.html

Using Minimal XHTML document

Testing PHP: Example 1

Integrating PHP & HTMLIntegrating PHP & HTML

<body><?php

$x = 1;for ($i = 0; $i < 10; $i++)

echo “<p>\$i = $i</p>\n”;// more php code

?></body>

Example 2

Targeting a PHP scriptTargeting a PHP script

<form action=”target.php” method=”post”><input type=”text” name=”field_name” /><input type=”submit” />

</form>

Now in target.php:$field_name = $_POST['field_name'];

Example 3

Practice - 1Practice - 1

Write the target script for example3.php

Practice - 1 (answers)Practice - 1 (answers)

<?php $lastname = $_POST['lastname']; echo "<p>The name you entered was: $lastname</p>\n";?>

Retrieving MySQL InformationRetrieving MySQL Information

SELECT {<column_list> | *}

FROM <table1> [, <table2> ...]

[WHERE <condition>]

[ORDER BY <order> [DESC] ]

[GROUP BY <group_condition>] ;

SELECT ClauseSELECT Clause

Use the SELECT clause to restrict which columns to display

SELECT firstname, lastname, email

SELECT qty, item_desc

SELECT *

FROM ClauseFROM Clause

Use the FROM clause to specify which table(s) to retrieve the data from

SELECT firstname, lastname, emailFROM customers;

SELECT *FROM orders;

WHERE ClauseWHERE Clause

Use the WHERE clause to restrict the number of rows to display

SELECT qty, item_descFROM itemsWHERE qty > 1;

SELECT *FROM ordersWHERE paid IS NULL;

JOINSJOINS

Several kinds

Common column

Can use either the FROM or WHERE clause

JOIN - WHEREJOIN - WHERE

Uses the WHERE clause to specify join condition

SELECT order_id, order_date, lastnameFROM orders, customersWHERE orders.cust_id = customers.cust_id;

SELECT qty, item_descFROM items, ordersWHERE items.order_id = orders.order_idAND items.order_id = 1002;


Use the satlug database to find out the following:

Names and addresses of all the customers

How many orders for each customer (just list them

and count)?

List the unfinished orders (completed IS NULL)

List the orders that have been shipped but haven't

been paid for yet

How many carrots did Bugs Bunny order (join items

to orders where cust_id = 4)?


SELECT firstname, lastname, address, city, state FROM customers;

SELECT * FROM orders;

SELECT * FROM orders WHERE completed IS NULL;


SELECT * FROM ordersWHERE completed IS NOT NULLAND paid IS NULL;

SELECT qty, item_descFROM items, ordersWHERE items.order_id = orders.order_idAND orders.cust_id = 4;

Accessing MySQL from PHPAccessing MySQL from PHP

$link = mysql_connect(“host”, “name”, “pw”);

mysql_select_db(“satlug”, $link);

$result = mysql_query($query);

while ($row = mysql_fetch_array($result))echo “$row[0] $row[1] \n”; // etc.

die(“Error message” . mysql_error());

Example 4


Modify example 3 source and target as follows:

Client enters last name, target displays first and last

names

Client enters cust_id, target displays order id and

order date for all orders

Client enters order_id, target displays qty and

description

Using $_GETUsing $_GET

In source file, create a link with parameter

<a href='target.php?id=$id'>Text</a>

In target file, use $_GET superglobal to get info

$id = $_GET['id'];

Creates different html for each table entry

Still only two files


Modify practice 3 source and target as follows:

Source looks up customer names, presents as links to

target using HTTP parameter (display name, use id as

parameter)

Target uses $_GET to determine cust_id, then looks

up other customer information

Target displays information

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Intro to LAMP Programming Presented for CIS Faculty at SAC by Dan Zollars.

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