使用cURL PHP / Graph API在Facebook上发表评论回复

$url = 'https://graph.facebook.com/' . $fbId . '/feed';

$attachment =  array(
        'access_token'  => $accessToken,'message'       => $msg,'name'          => $name,'link'          => $link,'description'   => $desc,'picture'       => $logo,);

// set the target url
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2);
curl_setopt($ch,CURLOPT_POST,true);
curl_setopt($ch,CURLOPT_POSTFIELDS,$attachment);
curl_setopt($ch,CURLOPT_HEADER,0);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$go = curl_exec($ch);
curl_close ($ch);

$go = explode(":",$go);
$go = str_ireplace('"','',$go[1]);
$go = str_ireplace('}',$go);
return $go;

但我想知道,如何使用cURL PHP或Facebook Graph API发布对特定Feed的回复.任何人都可以帮我解决这个问题吗？