Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in /var/www/html/component/db-config.php:16 Stack trace: #0 /var/www/html/component/db-config.php(34): dbc->open() #1 /var/www/html/component/controller.php(42): dbc->run_query('SELECT b.id, b....') #2 /var/www/html/blog.php(11): controller->fetch_query('SELECT b.id, b....') #3 {main} thrown in /var/www/html/component/db-config.php on line 16