Memcache::decrement
the Memcache::delete(key) function is broken on several combinations of memcached+pecl-memcache combinations.
pecl-memcache 2.2.5 + memcached 1.4.2 - Memcache::delete(key) WORKS
pecl-memcache 2.2.5 + memcached 1.4.3 - Memcache::delete(key) DOES NOT WORK
pecl-memcache 2.2.5 + memcached 1.4.4 - Memcache::delete(key) WORKS
pecl-memcache 2.2.5 + memcached 1.4.5 - Memcache::delete(key) WORKS
pecl-memcache 3.0.4 + memcached 1.4.2 - Memcache::delete(key) WORKS
pecl-memcache 3.0.4 + memcached 1.4.3 - Memcache::delete(key) DOES NOT WORK
pecl-memcache 3.0.4 + memcached 1.4.4 - Memcache::delete(key) DOES NOT WORK
pecl-memcache 3.0.4 + memcached 1.4.5 - Memcache::delete(key) DOES NOT WORK
Memcache::delete
(PECL memcache >= 0.2.0)
Memcache::delete — Elimina un valor del servidor
Descripción
bool Memcache::delete
( string
$key
[, int $timeout = 0
] )
Memcache::delete() elimina el valor según la clave key.
Parámetros
-
key -
La clave asociada con el valor a eliminar.
-
timeout -
Este parámetro ya no está soportado, y su valor por omisión es 0 segundos. No se debe usar este parámetro.
Historial de cambios
| Versión | Descripción |
|---|---|
| Desconocido |
No se recomienda utilizar el parámetro timeout. Su comportamiento
no es consistente entre las versiones de memcached, pero sí es seguro utilizar
0. El uso de otros valores puede provocar que la función delete
de memcache falle.
|
Valores devueltos
Devuelve TRUE en caso de éxito o FALSE en caso de error.
Ejemplos
Ejemplo #1 Ejemplo de Memcache::delete()
<?php
/* API por procedimientos */
$memcache_obj = memcache_connect('memcache_host', 11211);
/* el valor será eliminado por el servidor */
memcache_delete($memcache_obj, 'key_to_delete');
/* API OO */
$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host', 11211);
$memcache_obj->delete('key_to_delete');
?>
Ver también
- Memcache::set() - Guarda datos en el servidor
- Memcache::replace() - Reemplaza el valor de un valor existente
add a note
User Contributed Notes
Memcache::delete - [8 notes]
nibblebot at gmail dot com ¶
2 years ago
Anonymous ¶
2 years ago
Regardless of whether or not it succeeds, for me on Ubuntu 10.04 it always returns false. Just an FYI, you can't seem to rely on the result.
padys ¶
1 month ago
In my case this code does NOT work:
<?php
$memcache->set('index', 'deleted', 0, -1);
?>
because of expire == -1.
I set expire = 1 (and I prefer "replace"):
<?php
$memcache->replace('index', '', 0, 1);
?>
me at adamhahn dot com ¶
10 months ago
I could not get the delete to work properly, so I ended up trying the 'set' method and setting the timeout value to -1.
<?php
$memcache->set('index', 'deleted', 0, -1);
?>
It solved my problem with the delete method.
(using memcached 1.4.5 and pecl-memcache 3.0.6)
vbaspcppguy at gmail dot com ¶
2 years ago
According to the documents, $timeout is not required, but for me if I did not include it regardless of value, it fired an error. I made a simple fix for it.
<?php
class memcache_tools extends memcache
{
public function delete($key, $expire=0)
{
parent::delete($key, $expire);
}
}
?>
This will force it to behave as it should regardless of version.
Jocke Berg ¶
4 years ago
I was searching for a function/method in this class that would "reset" (or "update", depending on how you look at it) the timeout value for a key. I was searching my butt off when I finally figured; this is the one.
Example: You have accessed a web-page including something that should be "in-cache" for way more than 30 days (until the memcache server gets a downtime for some reason). Since the limit for having something in the cache is 30 days, this will be a problem. Simple (yet somewhat non-optimal) solution:
<?php
//How to "update" the value
if($memcache_key_exists){
$memcache_obj->delete('key', (3600*24*30));
}
?>
Have fun.
z at zaebal dot com ¶
3 years ago
To workaround the "delete" issue just pass zero as timeout parameter.
Wilfried Loche ¶
3 years ago
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