exit作用真的这么大吗？
正在编一个仓库管理系统。。入库没问题。。出库的时候。。
首先判定够不够，要是不够就
echo"<script>alert('此仓库没有这么多货物!!');history.go(-1);;</script>";
要是够的话后面就insert update。本来觉得跳转就已经可以防止后面insert update了，但是库存还是花花的减少啊，都成负数了。。。
一直想不明白，后来不知道咋想的后面加了句exit；貌似就好了？请问大大这是什么原理啊。。难道history.go(-1)跳转之后后面的还会继续运行？
回复讨论(解决方案)
这是肯定的。
这是肯定的。
这和函数不一样吗？要是跳到另外一个文件，本文件后面的还要执行？同时执行还是先执行完本文件的再执行跳转文件？
这是肯定的。
那是不是我要把我之前代码所有带跳转的后面都添加exit？
看情况吧，如果你不希望后面的代码执行了，那就加exit。
看情况吧，如果你不希望后面的代码执行了，那就加exit。
我一直以为后面代码自动不会运行的。。这下好了。。果然还要继续学习啊。。。还要加exit。。。
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