Connect to mysql with PHP

function connectToDatabase()
	{
		$server = "localhost";
		$username = "root";
		$password = "";
		$database = "tutorial";

		$connection = mysql_connect($server, $username, $password, $database);

		if (!$connection)
		{
			die ("could not connect to databse:" . mysql_error());
		}

		echo "Connection Succesful";

		return $connection;
	}