其实迅雷的thunder://地址就是将普通 url 地址加前缀 AA 、后缀ZZ，再 base64 编码后得到的字符串

普通 url 转 thunder

1function ThunderEncode($url) {
2    $thunderPrefix="AA";
3    $thunderPosix="ZZ";
4    $thunderTitle="thunder://";
5    $thunderUrl=$thunderTitle.base64_encode($thunderPrefix.$url.$thunderPosix);
6    return $thunderUrl;
7}

thunder 转普通 url

1function ThunderDecode($thunderUrl) {
2    $thunderPrefix="AA";
3    $thunderPosix="ZZ";
4    $thunderTitle="thunder://";
5    $url=substr(trim($thunderUrl),10);
6    $url=base64_decode($url);
7    $url=substr($url,2,-2);
8    return $url;
9}