추상적인：查$sql = "select * from cates where cid=$cid";删除$sql = "delete from cates where cid=$cid" ;修改$sql = "update cates set cname='$cname' where cid=$cid";添加$sql="i
查$sql = "select * from cates where cid=$cid";
删除$sql = "delete from cates where cid=$cid" ;
修改$sql = "update cates set cname='$cname' where cid=$cid";
添加$sql="insert into lyb_message(mtitle,mcontent,mtime,ip,uid)values('$title','$content','$time','$ip','$uid')";
교정 선생님：查无此人교정 시간：2019-05-09 14:09:25
선생님의 요약：写的不错。数据库最主要的就是增删查改。继续加油