ScotlandPHP

Memcache::delete

(PECL memcache >= 0.2.0)

Memcache::delete从服务端删除一个元素

说明

bool Memcache::delete ( string $key [, int $timeout = 0 ] )

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。

参数

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。

更新日志

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.

返回值

成功时返回 TRUE, 或者在失败时返回 FALSE

范例

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);

?>

参见

add a note add a note

User Contributed Notes 5 notes

up
7
nibblebot at gmail dot com
7 years ago
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
up
3
vbaspcppguy at gmail dot com
7 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.
up
2
me at adamhahn dot com
5 years 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)
up
0
padys
4 years 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);
?>
up
-4
Anonymous
7 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.
To Top