php 如何使用 Composer 从供应商外部自动加载类？
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How to I use Composer to autoload classes from outside the vendor?
提问by Tomasz Szymanek
I use psr-4autoloader from composer:
我使用psr-4Composer 的自动加载器：
"autoload": {
"psr-4": {
"DG\Munchkin\": "src/DG/Munch/"
}
}
This loads classes from /var/www/html/xxx/vendor/yyy/src/DG/Munch
这从 /var/www/html/xxx/vendor/yyy/src/DG/Munch
But how can I load classes from /var/www/html/xxx/?
但是我如何从 加载类/var/www/html/xxx/？
I wrote my own autoloader, but when I require vendor/autoload.php(composer autoload) and my autoloader, it won't work until I create instance of a class in my own autoloader.
我编写了自己的自动加载器，但是当我需要vendor/autoload.php(composer autoload) 和我的自动加载器时，只有在我自己的自动加载器中创建类的实例后，它才能工作。
回答by Jens A. Koch
The srcdirectory would be in your project root.
Its on the same level as vendordirectory is.
该src目录将在您的项目根目录中。它与vendor目录处于同一级别。
If you define
如果你定义
"autoload": {
"psr-4": {
"DG\Munchkin\": "src/DG/Munch/"
}
}
this will not load classes from /var/www/html/xxx/vendor/yyy/src/DG/Munch,
like you stated.
这不会/var/www/html/xxx/vendor/yyy/src/DG/Munch像您所说的那样从 加载类。
Because your project structure is:
因为你的项目结构是：
/var/www/html/
+- /xxx (project)
- composer.json
+- /src
+- DG
+- Munch
+- /vendor
- autoload.php
+- vendor-projectA
+- vendor-projectB
+- yyy
The \DG\Munchkinnamespace would map to classes inside
该\DG\Munchkin命名空间将映射到类中
/var/www/html/xxx/src/DG/Munchand not inside
/var/www/html/xxx/src/DG/Munch而不是里面
/var/www/html/xxx/vendor/yyy/src/DG/Munch.
/var/www/html/xxx/vendor/yyy/src/DG/Munch.
But how can I load classes from /var/www/html/xxx/?
但是如何从 /var/www/html/xxx/ 加载类？
Define the paths in the composer.json (inside /var/www/html/xxx/) of your project:
在您的项目的 composer.json（在 /var/www/html/xxx/ 内）中定义路径：
"autoload": {
"psr-4": {
"ProjectRoot\" : "",
"NamspaceInSourceDir\" : "src/"
}
}
or load the composer autoloader in your index.php or during it's bootstrap and add the paths manually:
或在 index.php 中或在引导过程中加载 Composer 自动加载器并手动添加路径：
$loader = require 'vendor/autoload.php';
$loader->add('Namespace\Somewhere\Else\', __DIR__);
$loader->add('Namespace\Somewhere\Else2\', '/var/www/html/xxx');
Referencing: https://getcomposer.org/doc/04-schema.md#autoload
