Manual de PHP
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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.

Ejemplo 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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pg_get_notify

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pg_get_result