(PECL memcached >= 0.1.0)
Memcached::flush — Invalidate all items in the cache
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.
Numer of seconds to wait before invalidating the items.
Returns TRUE on success or FALSE on failure. Use Memcached::getResultCode if necessary.
Example #1 Memcached::flush() example
$m = new Memcached();
/* flush all items in 10 seconds */