Php/docs/function.imap-ping
来自菜鸟教程
imap_ping
(PHP 4, PHP 5, PHP 7)
imap_ping — Check if the IMAP stream is still active
说明
imap_ping
( resource $imap_stream
) : bool
imap_ping() pings the stream to see if it's still active. It may discover new mail; this is the preferred method for a periodic "new mail check" as well as a "keep alive" for servers which have inactivity timeout.
返回值
Returns true
if the stream is still alive, false
otherwise.
范例
Example #1 imap_ping() Example
<?php$imap = imap_open("{imap.example.org}", "mailadmin", "password");// after some sleepingif (!imap_ping($imap)) { // do some stuff to reconnect}?>