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);
?>
(PECL memcache >= 0.2.0)
Memcache::delete — 从服务端删除一个元素
$key
, int $timeout = 0
) : bool
Memcache::delete()函数通过key删除一个元素。
如果参数timeout指定，该元素会在timeout秒后失效。
同样也可以使用memcache_delete()函数完成同样功能。
key要删除的元素的key。
timeout删除该元素的执行时间。如果值为0,则该元素立即删除，如果值为30,元素会在30秒内被删除。
| 版本 | 说明 |
|---|---|
| Unknown |
It's not recommended to use the timeout parameter. The
behavior differs between memcached versions, but setting to 0
is safe. Other values for this deprecated feature may cause the memcache delete
to fail.
|
成功时返回 true， 或者在失败时返回 false。
Example #1 Memcache::delete() example
<?php
/* procedural API */
$memcache_obj = memcache_connect('memcache_host', 11211);
/* 10秒后key_to_delete对应的值会被从服务端删除 */
memcache_delete($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);
?>
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);
?>
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)
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.
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.
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