Error in Class_Core

[xMisunderstoodx]

I got this error about 10 minutes ago on my site

Fatal error: Call to undefined function: mysqli_init() in /var/www/html/forum/includes/class_core.php on line 1021

I haven't even edited that file and i have no idea how to fix it :S help anyone?

[nico_swd]

mysqli is only supported in PHP 5, which your server might not supports. Try opening /includes/config.php and change $config['Database']['dbtype'] to mysql.

[xMisunderstoodx]

Nevermind fixed it