Php string function

Aug 21, 201514 likes6,467 views

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.

PHP String Function
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Output:
hello nandon
//here it replace world to nandon . Number 6 means the
replacement starts from 6 position of the string.
Example 2:
<!doctype <!DOCTYPE html>
<html>
<head>
<title>string function</title>
</head>
<body>
<?php
echo substr_replace("hello world", "nandon",-5);
?>
</body>
</html>
Output:
hello nandon
//here in this example we use (-) negative sign so it will
count the word from the right hand side and replace.

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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>
<?php
echo "String Function"
?>
</body>
</html>
Output:
String Function
//echo is not actually function so we are not required to use
parentheses with it.

2. strtolower: It converts a string to lower case letter.
Example:
<!doctype <!DOCTYPE html>
<html>
<head>
<title>string function</title>
</head>
<body>
<?php
echo strtolower("STRING Function") ;
?>
</body>
</html>
Output:
string function

3. strtoupper ( ): It converts a string to upper case
letter.
Example:
<!doctype <!DOCTYPE html>
<html>
<head>
<title>string function</title>
</head>
<body>
<?php
echo strtoupper("String Function") ;
?>
</body>
</html>
Output:
STRING FUNCTION

4. lcfirst( ): It converts the first character of a string to
lower.
Example:
<!doctype <!DOCTYPE html>
<html>
<head>
<title>string function</title>
</head>
<body>
<?php
echo lcfirst("String Function") ;
?>
</body>
</html>
Output:
string Function

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>
<?php
echo ucfirst("string function") ;
?>
</body>
</html>
Output:
String function

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>
<?php
echo ucwords("string function") ;
?>
</body>
</html>
Output:
String Function

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 the
examples are –
Example:
<!doctype <!DOCTYPE html>
<html>
<head>
<title>string function</title>
</head>
<body>
<?php
echo substr_replace("hello world","nandon",6);
?>
</body>
</html>

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1. PHP String Function ADMEC MULTIMEDIA Leader in Animation & Digital Media Education ISO 9001:2008 CERTIFIED | ADOBE Testing Center www.admecindia.co.in

2. 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.echo 2.strtolower ( ) 3.strtoupper ( ) 4.lcfirst() 5.ucfirst() 6.ucwords() 7.substr_replace ( )

3. 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> <?php echo "String Function" ?> </body> </html> Output: String Function //echo is not actually function so we are not required to use parentheses with it.

4. 2. strtolower: It converts a string to lower case letter. Example: <!doctype <!DOCTYPE html> <html> <head> <title>string function</title> </head> <body> <?php echo strtolower("STRING Function") ; ?> </body> </html> Output: string function

5. 3. strtoupper ( ): It converts a string to upper case letter. Example: <!doctype <!DOCTYPE html> <html> <head> <title>string function</title> </head> <body> <?php echo strtoupper("String Function") ; ?> </body> </html> Output: STRING FUNCTION

6. 4. lcfirst( ): It converts the first character of a string to lower. Example: <!doctype <!DOCTYPE html> <html> <head> <title>string function</title> </head> <body> <?php echo lcfirst("String Function") ; ?> </body> </html> Output: string Function

7. 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> <?php echo ucfirst("string function") ; ?> </body> </html> Output: String function

8. 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> <?php echo ucwords("string function") ; ?> </body> </html> Output: String Function

9. 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 the examples are – Example: <!doctype <!DOCTYPE html> <html> <head> <title>string function</title> </head> <body> <?php echo substr_replace("hello world","nandon",6); ?> </body> </html>

10. Output: hello nandon //here it replace world to nandon . Number 6 means the replacement starts from 6 position of the string. Example 2: <!doctype <!DOCTYPE html> <html> <head> <title>string function</title> </head> <body> <?php echo substr_replace("hello world", "nandon",-5); ?> </body> </html> Output: hello nandon //here in this example we use (-) negative sign so it will count the word from the right hand side and replace.

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