(PHP 4 >= 4.3.0)
pg_get_pid() gets backend (database server process) PID. PID is useful to check if NOTIFY message is sent from other process or not.
Example 1. PostgreSQL backend PID
<?php $conn = pg_pconnect("dbname=publisher");if (!$conn) { echo "An error occured.\n"; exit;}// Backend process PID. Use PID with pg_get_notify()$pid = pg_get_pid($conn);?>
See also pg_get_notify().