imap_gc()

(PHP 5 >= 5.3.0, PHP 7)

Clears IMAP cache

说明

imap_gc(resource $imap_stream,int $caches): bool

Purges the cache of entries of a specific type.

参数

$imap_stream

由imap_open()返回的 IMAP 流。

$caches

Specifies the cache to purge. It may one or a combination of the following constants:IMAP_GC_ELT(message cache elements),IMAP_GC_ENV(envelope and bodies),IMAP_GC_TEXTS(texts).

返回值

成功时返回TRUE，或者在失败时返回FALSE。

范例

Example #1 imap_gc() example

<?php
$mbox = imap_open("{imap.example.org:143}", "username", "password");
imap_gc($mbox, IMAP_GC_ELT);
?>

If you notice that you're program's memory usage is increasing (as observed using ps) while calling the imap functions, calling this function should free that memory.