PHP マニュアル: Returns the latency of this server in milliseconds

final public integernull MongoDB\Driver\Server::getLatency()

Returns the latency of this server in milliseconds. This is the client's measured » round trip time of a hello command.

この関数にはパラメータはありません。

Returns the latency of this server in milliseconds, or null if no latency has been measured (e.g. client is connected to a load balancer).

Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.

バージョン	説明
PECL mongodb 1.11.0	This method will return `null` if no latency has been measured. In earlier versions, an integer was always returned and an unset value might be reported as `-1`.

例1 MongoDB\Driver\Server::getLatency example

<?php

$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017/");
$server = $manager->selectServer();

var_dump($server->getLatency());

?>

上の例の出力は、たとえば以下のようになります。

int(592)