PHP addcslashes() function

Example

Add a backslash before the character "W":

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

Definition and usage

The addcslashes() function returns a string with a backslash added before the specified character.

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

Note: Be careful when applying addcslashes() to 0 (NULL), r (carriage return), n (line feed), t (form feed), f (tab), and v (vertical tab). In PHP, , r, n, t, f, and v are predefined escape sequences.

grammar

 addcslashes( string,characters )

parameter	describe
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 specific characters in a string:

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

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');?>