public function del($key)
    {
        if (is_string($key)) {
            $key = [$key];
        }

        return $this->getConnection()->del($key);
    }
public function del($key)
    {
        if (is_string($key)) {
            $key = [$key];
        }

        return $this->getConnection()->del($key);
    }
public function del ( $ key ) { if ( is_string ( $ key ) ) { $ key = [ $ key ] ; } return $ this -> getConnection ( ) -> del ( $ key ) ; }
Remove the specified key.

@param string $key

@return int
Remove the specified key .