Memcache::decrement
With the recent versions of memcached 1.4.3, the delete returns false because there is an error with the latest stable pecl extension 2.2.5.
Running memcached in -vvv mode will show why deletes fail:
CLIENT_ERROR bad command line format. Usage: delete <key> [noreply]
Simple fix, updated your memcache.c in your PECL extension at line 1494, in the mmc_delete() function. Change the command_len to the following:
command_len = spprintf(&command, 0, "delete %s", key);
This basically gets rid of that deprecated 3rd parameter, and deletes will work again. Hope this helps somebody (and gets fixed eventually).
Memcache::delete
(PECL memcache >= 0.2.0)
Memcache::delete — Delete item from the server
Beschreibung
bool Memcache::delete
( string $key
[, int $timeout
] )
Memcache::delete() deletes item with the key . If parameter timeout is specified, the item will expire after timeout seconds. Also you can use memcache_delete() function.
Parameter-Liste
- key
-
The key associated with the item to delete.
- timeout
-
Execution time of the item. If it's equal to zero, the item will be deleted right away whereas if you set it to 30, the item will be deleted in 30 seconds.
Rückgabewerte
Gibt bei Erfolg TRUE zurück, im Fehlerfall FALSE.
Beispiele
Beispiel #1 Memcache::delete() example
<?php
/* procedural API */
$memcache_obj = memcache_connect('memcache_host', 11211);
/* after 10 seconds item will be deleted by the server */
memcache_delete($memcache_obj, 'key_to_delete', 10);
/* OO API */
$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host', 11211);
$memcache_obj->delete('key_to_delete', 10);
?>
Siehe auch
- Memcache::set() - Store data at the server
- Memcache::replace() - Replace value of the existing item
add a note
User Contributed NotesMemcache::delete
harv at pringo dot com
10-Nov-2009 11:17
10-Nov-2009 11:17
Wilfried Loche
25-Aug-2009 09:01
25-Aug-2009 09:01
Hi,
Be careful about multi memcached servers. It seems logical the get() methods use only one server but, what about the delete() and update() methods?
In fact, at least the delete() method perform a delete on the first server it finds!
For the test code, you can see it there:
http://pecl.php.net/bugs/bug.php?id=16810
Hope this helps someone!
Wilfried
Jocke Berg
05-May-2009 10:02
05-May-2009 10:02
I was searching for a function/method in this class that would "reset" (or "update", depending on how you look at it) the timeout value for a key. I was searching my butt off when I finally figured; this is the one.
Example: You have accessed a web-page including something that should be "in-cache" for way more than 30 days (until the memcache server gets a downtime for some reason). Since the limit for having something in the cache is 30 days, this will be a problem. Simple (yet somewhat non-optimal) solution:
<?php
//How to "update" the value
if($memcache_key_exists){
$memcache_obj->delete('key', (3600*24*30));
}
?>
Have fun.