imap_ping()

(PHP 4, PHP 5, PHP 7)

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.

参数

$imap_stream

由imap_open()返回的 IMAP 流。

返回值

Returns TRUE if the stream is still alive,FALSE otherwise.

范例

Example #1 imap_ping() Example

<?php
$imap = imap_open("{imap.example.org}", "mailadmin", "password");
// after some sleeping
if (!imap_ping($imap)) {
    // do some stuff to reconnect
}
?>