MYSQL as a Unix Socket

A Unix socket is usually working with TCP/IP. TCP is a protocol. A socket is an ID for a connection.

In order to work on the same server, the local 127.0.0.0 address can be used, but I don't remember if there are other things to do. Maybe somebody else will give you a more complete answer, or the answer might be found somewhere on the site of MySQL.

$mysqli = new mysqli("127.0.0.1", "username", "password", "database");

See http://php.net/mysqli_connect for further reference. If you do not have the mysqli module enabled, see http://php.net/mysql_connect . If you do not have either of those modules enabled, you should look into configuring your PHP configuration file to load one of them.