Hi Misa > But Example shows - that C app - actually asks all the time to get notify... > when gets something more then 4 times - exit... until 4 times loops... > The same you can achieve with PHP... As far as I understood, with php I have to query the server again and again, and pg_get_notify will either return something or not depending on the query result: http://php.net/manual/en/function.pg-get-notify.php The provided sample however blocks until a notify is received (and does so 4 times just for demonstration puporse), so instead of frequently asking the server for notifications (polling), it wakes up when a notification arrives. > My guess is that main goal is let Web App know - something happened in > database... It isn't ;) Regards, Clemens -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general