本文章给大家分享一个PHP清除Memcache过期缓存程序代码,Memcached会采用LRU算法删除缓存内容或使用时删除过期内容,而有时Memcached这样的释放内存的机制并不能满足所有应用,故我们在PHP基础上实现了统一删除过期内容的功能,适用于定时清理.
PHP实例代码如下:
-
-
-
- class mem_dtor extends Memcache
- {
- private $server_id;
- public function __construct($host,$port)
- {
- $this->server_id = "$host:$port";
- $this->connect($host,$port);
- }
-
-
- public function gc()
- {
- $t = time();
- $_this = $this;
- $func = function($key,$info) use ($t,$_this)
- {
- if($info[1] - $t delete($key);
- }
- };
- $this->lists($func);
- }
-
-
- public function info()
- {
- $t = time();
- $func = function($key,$info) use ($t)
- {
- echo $key,' => Exp:',$info[1] - $t,"n";
- };
- $this->lists($func);
- }
-
- private function lists($func)
- {
- $sid = $this->server_id;
- $items = $this->getExtendedStats('items');
- foreach($items[$sid]['items'] as $slab_id => $slab)
- {
- $item = $this->getExtendedStats('cachedump',$slab_id,0);
- foreach($item[$sid] as $key => $info)
- {
- $func($key,$info);
- }
- }
- }
- }
- $mem = new mem_dtor('127.0.0.1',11211);
- $mem->info();
- $mem->gc();
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