function sanitize($input) {
     $search = array (
        '@<script[^>]*?>.*?</script>@si',
        '@<[/!]*?[^<>]*?>@si',
        '@<style[^>]*?>.*?</style>@siU',
        '@<![sS]*?--[ tnr]*>@'
     );
     if (is_array ( $input )) {
        foreach ( $input as $var => $val ) {
           $output [$var] = sanitize ( $val );
        }
     } else {
        $input = preg_replace ( $search, "", htmlspecialchars ( stripslashes
        ( trim ( $input ) ) ) );
     }
     return $input;
}