public function neiye()
{
$id = $this->request->param('id');
$array = [18,19,20];
$sql = db::table('articles') -> where('id',$id) -> find();
if (!$sql["seo_title"]){
$sql["seo_title"]=$sql["name"];
}
if (!$sql["description"]){
$content=strip_tags($sql["content"]);
$content=str_ireplace('"','',$content);//删除双引号
$content=mb_substr($content,0,200,"utf8");
$sql["description"]=$content;
}
//上一页
$shang=db::table('articles')->where("cid",'in',$array)->where("ordering",">=",$sql["ordering"])->where("id",">=",$sql["id"])->order("ordering,id")->limit(2)->select();