Memcache::flush

(PECL memcache >= 1.0.0)

Memcache::flush — Flush all existing items at the server

Açıklama

bool Memcache::flush ( void )

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.

Dönen Değerler

Başarı durumunda TRUE, başarısızlık durumunda FALSE döner.

Örnekler

Örnek 1 Memcache::flush() example


<?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();

?>

add a note User Contributed Notes Memcache::flush

Anonymous 27-Feb-2008 07:51


From the memcached mailing list:





"The flush has a one second granularity. The flush will expire all items up to the ones set within the same second."





It is imperative to wait at least one second after flush() command before further actions like repopulating the cache. Ohterwise new items < 1 second after flush() would be invalidatet instantaneous.





Example:


<?php


$memcache->flush();





$time = time()+1; //one second future


while(time() < $time) {


  //sleep


}


$memcache->set('key', 'value'); // repopulate the cache


?>

maarten d/ot manders a/t tilllate dotcom 12-Jul-2007 01:20


Please note that after flushing, you have to wait a certain amount of time (in my case < 1s) to be able to write to Memcached again. If you don't, Memcached::set() will return 1, although your data is in fact not saved.

add a note