php函数get_magic_quotes_gpc

echo get_magic_quotes_gpc();         // 很不好意思,我的这个是0
echo $_POST['lastname'];             // Simao'pig
echo addslashes($_POST['lastname']); // Simao\'pig
if (!get_magic_quotes_gpc()) {
    $lastname = addslashes($_POST['lastname']);
} else {
    $lastname = $_POST['lastname'];
}
echo $lastname; // Simao\'pig
$sql = "INSERT INTO lastnames (lastname) VALUES ('$lastname')";
?>