Facebook Graph API POST to a comment to a Stream object

I'm trying to post a comment to a status post on facebook. I've figured out how to "like" existing comments using the following code:

$status = $facebook->api("/$id/likes", 'post');

How would I modify the code to post a comment to 开发者_StackOverflow中文版this status message instead of like.

I've tried this: $status = $facebook->api("/$id/stream", 'post', "$comment");

but it returns this error: Invalid argument supplied for foreach()

I've also used "/$id/comments" instead of "/$id/stream", same error.

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$facebook->api('/'.$POST_ID.'/comments','post',array('message' => $comment)); works for me. Make sure that you have publish_stream permissions and that you provide a proper Post ID of the status message.