imap_ping

(PHP 4, PHP 5, PHP 7, PHP 8)

imap_ping — Check if the IMAP stream is still active

说明

imap_ping ( resource $imap ) : bool

imap_ping() pings the stream to see if it's still active. It may discover new mail; this is the preferred method for a periodic "new mail check" as well as a "keep alive" for servers which have inactivity timeout.

参数

imap

由 imap_open() 返回的 IMAP 流。

返回值

Returns true if the stream is still alive, false otherwise.

范例

示例 #1 imap_ping() Example

<?php

$imap = imap_open("{imap.example.org}", "mailadmin", "password");

// after some sleeping
if (!imap_ping($imap)) {
    // do some stuff to reconnect
}

?>