Add backslashes to certain characters in a string in PHP

Description

The following code shows how to add backslashes to certain characters in a string.

Example

/* w ww  .ja  va2s . co  m*/
<?php
    $str = "Welcome to my home!";
    echo $str."<br>";
    echo addcslashes($str,'m')."<br>";
    echo addcslashes($str,'H')."<br>";
?>

The code above generates the following result.