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.
(PHP 5 >= 5.3.0, PHP 7)
imap_gc — Clears IMAP cache
$imap_stream
, int $caches
) : boolPurges the cache of entries of a specific type.
imap_stream
Un flux IMAP întors de imap_open().
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).
Întoarce valoarea true
în cazul
succesului sau false
în cazul eșecului.
Example #1 imap_gc() example
<?php
$mbox = imap_open("{imap.example.org:143}", "username", "password");
imap_gc($mbox, IMAP_GC_ELT);
?>