关于新浪微博的问题 求大神分析错误原因

Question

=====post data====== string(206) "client_id=3216019551&client_secret=aab7a23965a9e4fb958dxxxxxxx &grant_type=authorization_code &code=a2960248100209b778202fcdc565df1d &redirect_uri=http%3A%2F%2Fwww.mayi121.com%2Fmember%2Foauth%2Fsinalogin"  =====info===== Array ( [url] => https://api.weibo.com/oauth2/access_token  [content_type] => [http_code] => 400 [header_size] => 217 [request_size] => 442 [filetime] => -1 [ssl_verify_result] => 20  [redirect_count] => 0  [total_time] => 0.016  [namelookup_time] => 0  [connect_time] => 0  [pretransfer_time] => 0.016 [size_upload] => 206  [size_download] => 194  [speed_download] => 12125  [speed_upload] => 12875  [download_content_length] => -1  [upload_content_length] => 0  [starttransfer_time] => 0.016  [redirect_time] => 0  [request_header] => POST /oauth2/access_token HTTP/1.0 User-Agent: Sae T OAuth2 v0.1 Host: api.weibo.com Accept: */* Accept-Encoding: deflate, gzip API-RemoteIP: 123.120.177.255  Content-Length: 206 Content-Type: application/x-www-form-urlencoded ) =====$response=====  {"error":"invalid_grant", "error_code":21325, "request":"/oauth2/access_token", "error_uri":"/oauth2/access_token", "error_description":"invalid authorization code:a2960248100209b778202fcdc565df1d"}