(PHP 3, PHP 4, PHP 5)

imap_ping -- Check if the IMAP stream is still active


bool imap_ping ( resource imap_stream )

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

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.

例子 1. imap_ping() Example


= imap_open("{}", "mailadmin", "password");

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


add a note add a note User Contributed Notes
28-Dec-2002 08:28
This is a great solution for a webmail class if you want to make sure that a user is still logged in. Example:

if(!(imap_ping($stream)) {
"The user is no longer logged in.");