Graph API尚不支持附件。

Per 文档

参数 ，图片，链接，
名称，标题，描述，来源

请参阅我的答案您的其他问题解决方法。

Right now I'm trying to figure out how to post an attachment using facebooks graph api.

Right now I'm using

            $attachment = array( 
                'message' => $_POST['tt'],
                'text' => 'Download',
                'name' => 'name', 
                'href' => 'http://www.url.com', 
                'description' => '  description!', 
                'media' => array(array(
                    'type' => 'mp3', 
                    'src' => $url, 
                    'href' => 'http://www.url.com/', 
                    'title' => $title,
                    'artist'=> 'artist',
                    'album'=>  'the album')));

        $statusUpdate = $facebook->api('/me/feed', 'post', $attachment);

Problem is it's only posting the message, nothing else, no attachment or anything.

Does anyone have any idea why?

Thanks

Attachments aren't yet supported by the Graph API.

Per the documentation

Arguments message, picture, link, name, caption, description, source

See my answer in your other question for a workaround.