Instaphp/Instagram/Media.php
public function Comment($media_id, $comment)
    {
        $this->AddParam('text', $comment);
        return $this->Post($this->buildUrl($media_id . '/comments'));
    }
public function Comment($media_id, $comment)
    {
        $this->AddParam('text', $comment);
        return $this->Post($this->buildUrl($media_id . '/comments'));
    }
Adds a comment to a particular media
@access public
@param int $media_id A media ID
@param string $comment The text of the comment
@param string $token An access token
@return Response