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7/21/2019 PHP String Function
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PHP String Function
ADMEC MULTIMEDIA
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PHP string function helps us to manipulate string in various ways.
There are various types of string function available.
Here we discuss some important functions and its use with examples.
1(ec)o2(trtolo'er * +,(trtou--er * +.(lc/rt*+
(uc/rt*+(uc'ord*+(u3tr4re-lace * +
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1. echo: It is used to print one or more string .Echo
function is faster than print print function.
Example:<!doctype <!DOCTYPE html><html><head>
<title>string function</title></head><body>
<phpecho "tring #unction>
</body></html>
Output:String Function
//echo is not actually function so we are notrequired to use parentheses with it.
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2. strtolower: It converts a string to lower case letter.
Example:
<!doctype <!DOCTYPE html><html><head>
<title>string function</title></head>
<body><phpecho strtolo%er&"T'()* #unction+ ,>
</body></html>
Output:string function
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3. strtoupper ( ): It converts a string to upper case
letter.
Example:
<!doctype <!DOCTYPE html><html><head>
<title>string function</title></head><body>
<phpecho strtoupper&"tring #unction+ ,>
</body>
</html>
Output:STI!" #$!%TIO!
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4. lcfirst( ): It converts the first character of a string to
lower.
Example:
<!doctype <!DOCTYPE html><html><head>
<title>string function</title>
</head><body>
<phpecho lc-rst&"tring #unction+ ,>
</body>
</html>
Output:string #unction
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5. ucfirst( ): It converts the first character of a string
to upper case.
Example:
<!doctype <!DOCTYPE html><html><head>
<title>string function</title></head><body>
<phpecho uc-rst&string function+ ,>
</body>
</html>
Output:String function
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6. ucwords( ): It converts the first character of every
word to upper case.
Example:
<!doctype <!DOCTYPE html><html><head>
<title>string function</title></head><body>
<phpecho uc%ords&string function+ ,>
</body>
</html>
Output:String #unction
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7. substr_replace( ): It replaces a part of a string
with another string.
The syntax is:Substr&replace 'string( replacement( start ( length)
There are various way to replace string. Here theexamples are *
Example:<!doctype <!DOCTYPE html><html><head>
<title>string function</title></head><body>
<phpecho substr.replace&hello %orldnandon0+,>
</body></html>
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Output:hello nandon
++here it replace world to nandon . !umber , means thereplacement starts from , position of the string.-xample :<!doctype <!DOCTYPE html><html><head>
<title>string function</title></head><body>
<phpecho substr.replace&hello %orld nandon12+,>
</body>
</html>Output: hello nandon++here in this example we use '/) negative sign so it willcount the word from the right hand side and replace.
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