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PHP addcslashes() Function

PHP String Reference PHP String Reference

Example

Add a backslash in front of the character "W":

<?php
$str = addcslashes("Hello World!","W");
echo($str);
?>

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Definition and Usage

The addcslashes() function returns a string with backslashes in front of the specified characters.

Note: The addcslashes() function is case-sensitive.

Note: Be careful using addcslashes() on 0 (NULL), r (carriage return), n (newline), f (form feed), t (tab) and v (vertical tab). In PHP, \0, \r, \n, \t, \f and \v are predefined escape sequences.


Syntax

addcslashes(string,characters)

Parameter Description
string Required. Specifies the string to be escaped
characters Required. Specifies the characters or range of characters to be escaped

Technical Details

Return Value: Returns the escaped string
PHP Version: 4+

More Examples

Example 1

Add backslashes to certain characters in a string:

<?php
$str = "Welcome to my humble Homepage!";
echo $str."<br>";
echo addcslashes($str,'m')."<br>";
echo addcslashes($str,'H')."<br>";
?>

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Example 2

Add backslashes to a range of characters in a string:

<?php
$str = "Welcome to my humble Homepage!";
echo $str."<br>";
echo addcslashes($str,'A..Z')."<br>";
echo addcslashes($str,'a..z')."<br>";
echo addcslashes($str,'a..g');
?>

Run example »

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