“Lost connection to MySQL server during query”
July 20th, 2009 by ndthuan

If you don’t perform any query after creating connection to MySQL server, it may cause this problem.

The simple solution is to use mysql_ping PHP function to check the connection, if it’s lost, attempt to recreate it.

if (!mysql_ping($linkId)) {
    mysql_close($linkId);
    mysql_connect('host', 'username', 'password');
    mysql_select_db('db_name');
    // do your normal queries here
}