php urlcode 解析gb2312

        header('Content-type: text/html; charset=utf-8');
        echo '<br />百度关键词URL编码转换示例：<br />';
        $urlBaidu = '%B9%AB%D6%DA%BA%C5%B9%D8%D7%A2%C8%CE%CE%F1';
        parse_str($urlBaidu,$output);
        $strUTF8 = mb_convert_encoding(implode(",",array_flip($output)), 'utf-8', 'gb2312');
        echo '可读码：' . $strUTF8 . '<br />';