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How insert slash in mysql DB after addslashes()
<?php
$link = mysql_connect('localhost', 'root', 'root')
    OR die(mysql_error());
mysql_select_db('autos') or die('no db');
$bookName = "O'relly";
$user = addslashes($bookName);

$query = "INSERT INTO makes VALUES(null, '{$user}')";
mysql_query($query) OR die(mysql_error());

var_dump($user);

?>

INSERT INTO makes VALUES(null, 'O'relly')