php man page for pg_get_notify

PG_GET_NOTIFY(3)														  PG_GET_NOTIFY(3)

pg_get_notify - Gets SQL NOTIFY message

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

DESCRIPTION
       pg_get_notify(3) gets notifications generated by a NOTIFY SQL command. To receive notifications, the LISTEN SQL command must be issued.

PARAMETERS
	      o $connection
		- PostgreSQL database connection resource.

	      o $result_type
		-  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(3) 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 associa-
		tive indices.

RETURN VALUES
	An array containing the NOTIFY message name and backend PID. Otherwise if no NOTIFY is waiting, then FALSE is returned.

EXAMPLES
       Example #1

	      PostgreSQL NOTIFY message

	      <?php
	      $conn = pg_pconnect("dbname=publisher");
	      if (!$conn) {
		echo "An error occurred.
";
		exit;
	      }

	      // Listen 'author_updated' message from other processes
	      pg_query($conn, 'LISTEN author_updated;');
	      $notify = pg_get_notify($conn);
	      if (!$notify) {
		echo "No messages
";
	      } else {
		print_r($notify);
	      }
	      ?>

SEE ALSO
       pg_get_pid(3).

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