从包含的文件中调用包含 [英] calling include from an included file

问题描述

所以， 检查此目录结构

So, examining this directory structure

• /include_one.php
• /include_two.php
• /directory/main_file.php

• /include_one.php
• /include_two.php
• /directory/main_file.php

假设我在/directory/main_file.php 中，并且在 include_one.php 内调用include('../include_one.php');，以包含 include_two.php .我需要打include('include_two.php);或include('../include_two.php');吗?

Assume that I am in /directory/main_file.php and I call include('../include_one.php'); inside of include_one.php, to include include_two.php. Do I need to call include('include_two.php); or include('../include_two.php');?

所以我的问题是:包含文件时，相对包含路径"是否转移到了包含文件中，还是保留在主要包含文件中?

So my question is: When including a file, is the 'relative include path' shifted to the included file, or does it remain at the main including file?

我知道最好的选择是拥有一个包含root_path的config.php，但是在现阶段这是不可能的.

I am aware that the best alternative would be to have a config.php which contains the root_path, however this is not possible at this stage.

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更新:
所以，我不确定谁是对的，因为这是我的测试

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update:
So, im not sure who is right, as here is my test

目录结构

/include.php
/start/start.php
/folder1/includeone.php
/folder1/folder2/includetwo.php

/include.php
/start/start.php
/folder1/includeone.php
/folder1/folder2/includetwo.php

这是每个文件的内容

start.php

<?php 
  echo 'including ../include.php<br />';
  include('../include.php');
?>

include.php

<?php 
  echo 'including folder1/includeone.php<br />';
  include('folder1/includeone.php');
?>

includeone.php

<?php 
  echo 'including folder2/includetwo.php<br />';
  include('folder2/includetwo.php');
?>

includetwo.php

<?php 
  echo 'done<br />';
?>

，输出为

包括../include.php
包括folder1/includeone.php
包括folder2/includetwo.php
完成

including ../include.php
including folder1/includeone.php
including folder2/includetwo.php
done

推荐答案

相对包含路径"没有移到包含文件中……这意味着使用相对路径通常会以错误的方式结束.

The "relative include path" is not shifted to the included file... Which means that using relative paths generally ends badly.

我几乎一直使用的更好的解决方案是始终使用绝对路径-您可以使用__DIR__混合亲戚路径和绝对路径，以获得包含写入该文件的目录.

A better solution, that I use almost all the time, is to always work with absolute paths -- and you can mix relatives and absolute paths using __DIR__, to get the directory that contains the file where this is written.

例如，在include_one.php中，您将使用:

For example, in include_one.php, you'd use :

require_once __DIR__ . '/include_two.php';

要包含与相同目录中的include_two.php文件.

并且，在main_file.php中，您将使用:

And, in main_file.php, you'd use :

require_once __DIR__ . '/../include_one.php';

要包含一个目录中的include_one.php文件.

To include the include_one.php file that's one directory up.

这样，无论从哪个文件中调用它们，都可以使用它们.

With that, your includes will work, no matter from which file they are called.

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