public function detail($id = 0) {
$unique_name = config('unique_name');
$article = db("{$unique_name}_article")
->where('is_del', 0)
->where('status', 1)
->where('id', $id)
->find();
if (!$article) {
throw new \think\exception\HttpException(404, '文章不存在或链接已删除');
}
$article['content'] = add_keyword_link($article['content']);
$this->assign('article', $article);
$this->assign('pindao_name', $article['pindao_name']);
$this->assign('pindao', $article['pindao']);
$this->assign('pindao_url', url("index/{$article['pindao']}/index"));
$conf = db('conf')->where('web_id', config('web_id'))->find();
$title = $article['title'] . ' - ' . $article['pindao_name'] . ' - ' . $conf['web_name'];