Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in /var/www/html/connection.php:2 Stack trace: #0 /var/www/html/includes/frontend_content.php(3): include() #1 /var/www/html/index.php(9): include('/var/www/html/i...') #2 {main} thrown in /var/www/html/connection.php on line 2