Error

SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

PDOException: SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) (~/cms/_includes/_functions/database.class.php:43) at PDO->__construct() (~/cms/_includes/_functions/database.class.php:43) at Daveismyname\PdoWrapper\Database::get() (~/cms/_includes/_config/database.php:7) at require_once("~/cms/_includes/_config/database.php") (~/_includes/config.php:6) at require_once("~/_includes/config.php") (~/sitemap.php:5)