为什么我数字更新+1出错呢？

bloglove

A PHP Error was encounteredSeverity: Notice
Message: Use of undefined constant clicknum - assumed 'clicknum'
Filename: models/article_detail_model.php
Line Number: 7

yuwen002

PHP，好像总是这样吧。
就是不会框架写程序也是这样的啊。