Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /var/www/vkvpa/head.php:17 Stack trace: #0 /var/www/vkvpa/head.php(17): mysqli_query() #1 /var/www/vkvpa/head.php(44): mq() #2 /var/www/vkvpa/index.php(9): include('...') #3 {main} thrown in /var/www/vkvpa/head.php on line 17