Class 'mysqli' not found

Uncaught Error

An uncaught Error was thrown on line 7 of file /var/www/car4play/html/lib/cMySQLi.php that prevented further execution of this request.

/var/www/car4play/html/lib/cMySQLi.php

File	Line	Class	Function	Arguments
/var/www/car4play/includes/db_settings.php	12		require_once
/var/www/car4play/html/application.php	56		require	/var/www/car4play/includes/db_settings.php
/var/www/car4play/html/index.php	14		require	/var/www/car4play/html/application.php