If you want to connect PHP to MySQL, use the following code. Replace the login and connection details against those that you have received from us in your Customer Zone.
$mysql_host = "mysqlserver.loopia.se"; /* Change to correct hostname, such as mysql369.loopia.se */
$mysql_user = "your_user";
$mysql_password = "your_password";
$mysql_database = "database_name";
$mysqli = new mysqli( $mysql_host, $mysql_user, $mysql_password, $mysql_database );
if ($mysqli->connect_errno) {
echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
}