public function dump($key)
    {
        $this->init();
        $result = $this->driver->dump($key);
        return $this->convertFalseToNull($result);
    }
public function dump($key)
    {
        $this->init();
        $result = $this->driver->dump($key);
        return $this->convertFalseToNull($result);
    }
public function dump ( $ key ) { $ this -> init ( ) ; $ result = $ this -> driver -> dump ( $ key ) ; return $ this -> convertFalseToNull ( $ result ) ; }
Return a serialized version of the value stored at the specified key
@param string $key
@return string|null serialized value, null if key doesn't exist
Return a serialized version of the value stored at the specified key