//redis$redis = new Redis();$redis->connect("host", "port");$redis->select(0);  //redis默认有0-15 16个数据库 此处选择0$redis->dbsize();   //返回有多少个key$keys = $redis->keys("*"); //使用通配符列出所有keyvar_dump($keys);//memcache$servers = array(array("host1", "port1"), array("host2", "port2"));$mem = new Memcache();$mem->addServer("host1", "port1");$mem->addServer("host2", "port2");$all_items = $memcache->getExtendedStats(‘items‘);$options = array("host1:port1","host2:port2");
foreach($servers as $server){  $option = $server[0] . ":" . $server[1];    if(isset($all_items[$option][‘items‘])) {      $items = $all_items[$option][‘items‘];        foreach ($items as $number => $item) {        $str = $memcache->getExtendedStats(‘cachedump‘, $number, 0);        $line  = $str[$option];        if(is_array($line) && count($line) > 0){          foreach ($line as $key=>$value) {            $keys[] = $key;          }        }      }    }}var_dump($keys);