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Jun 23, 2016 pm 01:41 PM

最近在学习中，遇见了表单重复提交问题。后来百度搜索到用 header("location:$post");解决。
我的表单是提交给本页面，本页面获取$_POST值来组成SQL语句，最后函数执行SQL语句。
$sql = "...";//组成SQL语句     1
exeupdate($sql);//自己写的执行函数  2
header("location:$post");//跳转  3

本来我以为正常的执行顺序是 1,2,3     然后转换回本页面，因为本页面通过SESSION值可以获取到数据，所以可以看到即时的数据更新后的情况。

但我把2 3颠倒顺序后，数据还是可以更新。这是为什么呢？

回复讨论(解决方案)

header 之后他还是会执行后面的代码不就解释了你的疑问拉

来个 EXIT

header 只是发送一个 http 协议头
并不会中断当前程序的执行

如楼上说的header 只是发送一个 http 协议头
再跳转之前他还会往下执行，一般跳转和exit();配合使用

我比较好奇表单重复提交跟重定向有什么关系...

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