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PHP pg_get_notify

PHP original manual for pg_get_notify [ show | php.net ]


(PHP 4 >= 4.3.0, PHP 5, PHP 7)

pg_get_notifyGets SQL NOTIFY message


array pg_get_notify ( resource $connection [, int $result_type ] )

pg_get_notify() gets notifications generated by a NOTIFY SQL command. To receive notifications, the LISTEN SQL command must be issued.



PostgreSQL database connection resource.


An optional parameter that controls how the returned array is indexed. result_type is a constant and can take the following values: PGSQL_ASSOC, PGSQL_NUM and PGSQL_BOTH. Using PGSQL_NUM, pg_get_notify() will return an array with numerical indices, using PGSQL_ASSOC it will return only associative indices while PGSQL_BOTH, the default, will return both numerical and associative indices.

Return Values

An array containing the NOTIFY message name and backend PID. As of PHP 5.4.0 and if supported by the server, the array also contains the server version and the payload. Otherwise if no NOTIFY is waiting, then FALSE is returned.


Example #1 PostgreSQL NOTIFY message

if (!
$conn) {
"An error occurred.\n";

// Listen 'author_updated' message from other processes
pg_query($conn'LISTEN author_updated;');
$notify pg_get_notify($conn);
if (!
$notify) {
"No messages\n";
} else {

See Also