如何检测如果文件正在被访问或请求？ [英] How to detect if file is being accessed or requested?

问题描述

AI有一个PHP文件，如果用户直接访问它，他应该被重定向到另一个位置，但如果我的脚本，通过Ajax调用它，它应该做的没有什么特别的。

A I have a PHP file that if the user access it directly he should be redirected to another location, but if my script call it through ajax, it should do nothing special.

例如，如果用户访问

/site/page.php

他应该被重定向到

/index.php?view=page

但如果他是在的index.php？认为=页文件应加载没有重定向。

But if he is on the index.php?view=page the file should load without redirects.

我怎么能这样做？

推荐答案

修改：如果您想确定是否通过JavaScript或没有请求的脚本，你必须以某种信号吧。

EDIT: If you want to determine if a script was requested through Javascript or not, you'll have to signal it somehow.

若干工具包定义标题 X-要求 - 以。在这种情况下，您可以检查的JavaScript调用带：

Several toolkits define the header X-Requested-With. In that case, you can check for a Javascript call with:

if (isset($_SERVER['HTTP_X_REQUESTED_WITH']) &&
        strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
    //requested with Javascript
}

---

您可以检查由 debug_backtrace 。

---

You can check the size of the result given by debug_backtrace.

或者（更好的），你可以检查 $ _ SERVER ['SCRIPT_FILENAME'] ：

Alternatively (better), you can check $_SERVER['SCRIPT_FILENAME']:

if (realpath(__FILE__) == realpath($_SERVER['SCRIPT_FILENAME'])) {
    //this one was requested; not in include
}

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