IndexAction::checkPost PHP Method

    public function checkPost()
    {
        $weiba_id = intval($_POST['weiba_id']);
        $map['weiba_id'] = $weiba_id;
        $map['follower_uid'] = $this->mid;
        if (D('weiba_follow')->where($map)->find()) {
            echo 1;
        } else {
            echo 0;
        }
    }