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# pg_get_pid

(PHP 4 >= 4.3.0, PHP 5)

pg_get_pid -- Ping database connection

## Description

int pg_get_pid ( resource connection )

pg_get_pid() gets backend (database server process) PID. PID is useful to check if NOTIFY message is sent from other process or not.

範例 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().

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