Problem in single quote

[eluser]Isern Palaus[/eluser]
http://php.net/manual/en/function.addslashes.php
http://www.php.net/manual/en/function.stripslashes.php

Code:

$add = "Mc’Donald - I need to allow this value into database.";
$add = addslashes($add);

echo $add;

$strip = $add;
$strip = stripslashes($strip);

echo $strip;