redis缓存操作有哪几种

 $Ranking = $this->Redis->_delete('lianmengname');

2. 读取readis缓存

 $Ranking = $this->Redis->_get('lianmengname');

3. 存redis

if(empty($Ranking)){
      $Ranking = $this->DoubleAct->selectRanking();
      $this->Redis->_set('lianmengname',json_encode($Ranking),1800);//缓存半小时
    }

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