Memcache::flush() immediately invalidates all
existing items. Memcache::flush() doesn't
actually free any resources, it only marks all the items as expired, so
occupied memory will be overwritten by new items.
Also you can use memcache_flush() function.
返回值
如果成功则返回 TRUE
,失败则返回 FALSE
。
范例
<?php
/* procedural API */
$memcache_obj = memcache_connect('memcache_host', 11211);
memcache_flush($memcache_obj);
/* OO API */
$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host', 11211);
$memcache_obj->flush();
?>