Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in /var/www/html/body/todo/includes/class.db.mysql.php:71 Stack trace: #0 /var/www/html/body/todo/init.php(39): Database_Mysql->connect() #1 /var/www/html/body/todo/index.php(8): require_once('...') #2 {main} thrown in /var/www/html/body/todo/includes/class.db.mysql.php on line 71