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PHP Quiz PHP CertificatePHP addcslashes() Function
Example
Add a backslash in front of the character "W":
<?php
$str = addcslashes("Hello World!","W");
echo($str);
?>
$str = addcslashes("Hello World!","W");
echo($str);
?>
Run example »
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), t (form feed), f (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>";
?>
$str = "Welcome to my humble Homepage!";
echo $str."<br>";
echo addcslashes($str,'m')."<br>";
echo addcslashes($str,'H')."<br>";
?>
Run example »
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');
?>
$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 »
Complete PHP String Reference
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