public function sFlush($key) {
        $this->_redis->multi();
        $this->_redis->sMembers($key);
        $this->_redis->del($key);
        return $this->_redis->exec()[0];
    }
public function sFlush($key) {
        $this->_redis->multi();
        $this->_redis->sMembers($key);
        $this->_redis->del($key);
        return $this->_redis->exec()[0];
    }
public function sFlush ( $ key ) { $ this -> _redis -> multi ( ) ; $ this -> _redis -> sMembers ( $ key ) ; $ this -> _redis -> del ( $ key ) ; return $ this -> _redis -> exec ( ) [ 0 ] ; }
Remove and return all members of a set

@param string $key
@return string[]
Remove and return all members of a set