imap_ping
(PHP 4, PHP 5, PHP 7, PHP 8)
imap_ping — Check if the IMAP stream is still active
说明
imap_ping(IMAP\Connection
$imap): boolimap_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 -
IMAP\Connection 实例。
返回值
Returns true if the stream is still alive, false otherwise.
更新日志
| 版本 | 说明 |
|---|---|
| 8.1.0 |
现在 imap 参数接受 IMAP\Connection
实例，之前接受 资源(resource)。
|
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
}
?>
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