Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, string given in /var/www/html/mherbsdb/index.php:23 Stack trace: #0 /var/www/html/mherbsdb/index.php(23): mysqli_query() #1 {main} thrown in /var/www/html/mherbsdb/index.php on line 23