Fatal error: Uncaught Error: PDOStatement::bindParam(): Argument #2 ($var) could not be passed by reference in /var/www/vhosts/lhcwtcfp.host283.checkdomain.de/restaurant/public/index.php:23 Stack trace: #0 {main} thrown in /var/www/vhosts/lhcwtcfp.host283.checkdomain.de/restaurant/public/index.php on line 23