php 如何使用__dir__？
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How to use __dir__?
提问by JosefPP
I want to use __dir__.
我想用__dir__.
However, I can't find any good tutorial on how to set it up. I have my htdocs in Dropbox.
但是，我找不到关于如何设置它的任何好的教程。我在 Dropbox 中有我的 htdoc。
Does it work something like this?
它的工作原理是这样的吗？
define(__DIR___, 'd:documents/dropbox/yolo/swag/htdocs/myproject/test/newtest/
testphp/test_new/testincludes/1/new_folder/')
That is the directory where my project is located and it has sub folders. I want to include a file into another file that is in the parent folder.
那是我的项目所在的目录，它有子文件夹。我想将一个文件包含到父文件夹中的另一个文件中。
Should I then just type:
我应该输入：
include'__DIR__/warlock.php';
Or do I have to type something like this?
或者我必须输入这样的东西吗？
include '___DIR__/wow/newb/guidesfornabz/classes/casters/warlock.php';
回答by Howl
You can use __DIR__to get your current script's directory. It has been in PHP only since version 5.3, and it's the same as using dirname(__FILE__). In most cases it is used to include another file from an included file.
您可以使用__DIR__来获取当前脚本的目录。它仅在 PHP 5.3 版本后才出现，并且与使用dirname(__FILE__). 在大多数情况下，它用于从包含的文件中包含另一个文件。
Consider having two files in a directory called inc, which is a subfolder of our project's directory, where the index.phpfile lies.
考虑在名为 的目录中有两个文件，该目录inc是我们项目目录的子文件夹，index.php文件所在的目录。
project
├── inc
│?? ├── file1.php
│?? └── file2.php
└── index.php
If we do include "inc/file1.php";from index.phpit will work. However, from file1.phpto include file2.phpwe must do an include relative to index.phpand not from file1.php(so, include "inc/file2.php";). __DIR__fixes this, so from file1.phpwe can do this:
如果我们这样做include "inc/file1.php";，index.php它将起作用。然而，从file1.php到包含file2.php我们必须做一个相对于 index.php而不是 from file1.php(so, include "inc/file2.php";) 的包含。__DIR__解决了这个问题，所以file1.php我们可以这样做：
<?php
include __DIR__ . "/file2.php";
To answer your question: to include the file warlock.phpthat is in your included file's upper directory, this is the best solution:
要回答您的问题：要包含warlock.php包含文件的上层目录中的文件，这是最佳解决方案：
<?php
include __DIR__ . "/../warlock.php";
