Руководство по PHP
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pg_ping

(PHP 4 >= 4.3.0)

pg_ping -- Ping database connection

Description

bool pg_ping ( resource connection)

pg_ping() ping database connection, try to reconnect if it is broken. It returns TRUE if connection is alive, otherwise FALSE.

See also pg_connection_status() and pg_connection_reset().

Пример 1. PostgreSQL ping

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

if (!pg_ping($conn))
    die("Connection is broken\n");
?>

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pg_pconnectУровень вышеpg_port