Add backslashes to the predefined characters in a string in PHP

Description

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

Example

/*  ww w.j  a v  a2s .  c  o m*/
<?php
    $str = "What's XML?";
    echo $str . " This is not safe in a database query.<br>";
    echo addslashes($str) . " This is safe in a database query.";
?>

The code above generates the following result.