Warning: mysqli_connect(): MySQL server has gone away in D:\www\www670\includes\functions\database.php on line 20

Warning: mysqli_connect(): Error while reading greeting packet. PID=61124 in D:\www\www670\includes\functions\database.php on line 20

Warning: mysqli_connect(): (HY000/2006): MySQL server has gone away in D:\www\www670\includes\functions\database.php on line 20
Unable to connect to database server!