# pg_get_pid

(PHP 4 >= 4.3.0, PHP 5)

pg_get_pid — Gets the backend's process ID

### Description

int pg_get_pid ( resource `$connection` )

pg_get_pid() gets the backend's (database server process) PID. The PID is useful to determine whether or not a NOTIFY message received via pg_get_notify() is sent from another process or not.

### Parameters

`connection`

  PostgreSQL database connection resource.

### Return Values

The backend database process ID.

### Examples

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()