不能包含或要求绝对路径 | 不能包含或要求绝对路径

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问题描述

服务器上的Apache版本:2.2.26

服务器上的 PHP 版本:5.5.9

我在一个文件夹中有一个名为 admin_config.php 的文件，其中有一个 .htaccess 文件，其中 Deny from ALL 值.>

从 index.php(在 DOCUMENT_ROOT)我试图用下面的行包含这个文件:

include '/core/config/admin_config.php'

在家里，这很好用.在我的云服务器上，这不起作用(没有错误消息).如果我改用 require，则会收到内部 500 错误.

如果我将行更改为相对路径，它会起作用:

include 'core/config/admin_config.php'

为什么这里不能设置绝对路径?这是服务器上的一些错误，还是我的错误

解决方案

您提供给 include 或 require 的路径是本地文件系统.它们不是您在访问您网站的 URL 中看到的内容.以 / 开头的绝对路径来自文件系统的根目录.在 Windows 术语中，/foo 是 C:\foo\.像 foo/bar 这样的相对路径是相对于 PATH 配置变量的，这取决于你的 PATH 是如何设置的，它也包括哪些 PHP文件被调用.

使用绝对路径通常不是一个好主意，因为它们在不同的系统上可能会有所不同(如您所见).在您的本地机器上，该站点可能位于 C:\core\...，但在服务器上，它将运行在 /var/www/mysite/core/....PATH 使用起来也很麻烦.最好的方法通常是使用 __DIR__ 或 __FILE__ 魔术常量来构造相对于当前文件的绝对路径(如果有意义的话):

需要 __DIR__ .'/some/folder/file.php`;

这包括相对于写入它的文件的文件 some/folder/file.php.

Apache version on server: 2.2.26

PHP version on server: 5.5.9

I have a file called admin_config.php in a folder, which has an .htaccess file with Deny from ALL value.

From index.php (at DOCUMENT_ROOT) I'm trying to include this file with the following line:

include '/core/config/admin_config.php'

At home, this works fine. On my cloud server, this doesn't work (no error message). If I use require instead, I get an internal 500 error.

If I change the line to a relative path, it works:

include 'core/config/admin_config.php'

Why can't I set an absolute path here? Is this some bug on the server, or an error on my part

解决方案

Paths you give to include or require are paths on the local filesystem. They are not what you see in URLs to access your site. An absolute path starting with / is from the root of the filesystem. In Windows terms, /foo is C:\foo\. Relative paths like foo/bar are relative to the the PATH configuration variable, which depends on how your PATH is set up which also includes which PHP file was invoked.

It's typically not a good idea to use absolute paths, since those are likely different on different systems (as you are experiencing). On your local machine the site may live in C:\core\..., but on the server it'll be running in /var/www/mysite/core/.... PATHs can also be cumbersome to work with. The best is typically to use __DIR__ or __FILE__ magic constants to construct an absolute path relative to the current file (if that made sense):

require __DIR__ . '/some/folder/file.php`;

This includes the file some/folder/file.php relative to the file in which it is written.

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