The mysqli extension is missing.

The mysqli extension is missing. Please check your PHP configuration. <a href=”Documentation.html#faqmysql” target=”documentation”><img src=”./themes/pmahomme/img/b_help.png” width=”11″ height=”11″ alt=”Documentation” title=”Documentation” /></a>

If you have installed mysql-server then you need to run this command:

sudo apt-get install php5-mysql

and then reload the server.