Memcached::flush invalidates all existing cache items
immediately (by default) or after the delay
specified. After invalidation none of the items will be returned in
response to a retrieval command (unless it's stored again under the same
key after Memcached::flush has invalidated the items).
The flush does not actually free all the memory taken up by the existing
items; that will happen gradually as new items are stored.
Parameters
delay
Number of seconds to wait before invalidating the items.
Return Values
Returns TRUE on success or FALSE on failure.
Use Memcached::getResultCode if necessary.
Examples
Example #1 Memcached::flush example
<?php $m = new Memcached(); $m->addServer('localhost', 11211);
/* flush all items in 10 seconds */ $m->flush(10); ?>