微社区中点击登录，提示redirect_url参数错误

https://open.weixin.qq.com/connect/oauth2/authorize?appid=wxcbf7e5e57b5449a5&redirect_uri=http%3A%2F%2Fbbs.wanyol.com%2Fplugin.php%3Fid%3Dwechat%26mobile%3D2%26key%3D%26referer%3Dhttp%253A%252F%252Fwsq.discuz.qq.com%252F%252F%253Fsiteid%253D263705437%2526c%253Dindex%2526a%253Dindex%2526from%253Dmq%2526source%253D%2526login%253Dyes%2526state%253Dsiteregister%26username%3Dd3hfZTBDM2ZNdFQJ%26ac%3Dbind%26oauth%3Dyes&response_type=code&scope=snsapi_base&state=#wechat_redirect

这个为返回的参数，用url_encode解码是，redirect_uri中的referer无法正常解析出来