检查是否在PHP中发回了请求 [英] Checking if request is post back in PHP

问题描述

我如何检查请求是否是PHP回发，下面可以吗?

How can I check if the request is a post back in PHP, is the below ok?

if (isset($_POST["submit"]))

其中submit是<input type="submit" />

推荐答案

如果您知道并期望在同一页面上有这样的提交按钮，那么该方法将起作用.

That will work if you know and expect such a submit button on the same page.

如果您对请求变量一无所知，另一种方法是检查请求方法:

If you don't immediately know anything about the request variables, another way is to check the request method:

if (strtoupper($_SERVER['REQUEST_METHOD']) == 'POST')

正如评论中指出的那样，不仅要检查回发，而不仅仅是任何POST请求，都需要确保引荐来源网址与处理页面位于同一页面.像这样:

As pointed out in the comments, to specifically check for a postback and not just any POST request, you need to ensure that the referrer is the same page as the processing page. Something like this:

if (basename($_SERVER['HTTP_REFERER']) == $_SERVER['SCRIPT_NAME'])

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