php - Post facebook event on group wall -

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i'm trying post event on group wall-

try  {    $ret_obj = $facebook->api($groupid.'/feed', 'post',                           array(                            'link' => 'https://www.facebook.com/events/event_id/'));   }  catch(facebookapiexception $e)  { }

this code post event doesn't appear on group . show name of event,but doesnt show picture,details , more...

ps: work on page wall , have chech group permissions tell me wrong,is facebook issue ??

facebook might not able fetch details link; can manually set other parameters- 

array(         'lik' => 'https://www.facebook.com/events/event_id/',         'picture' => picture_url,         'description' => desc,         'caption' => caption  ));

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