如何使用 Composer 从供应商外部自动加载类? [英] How to use Composer to autoload classes from outside the vendor?

问题描述

我使用 Composer 的 psr-4 自动加载器:

I use psr-4 autoloader from composer:

"autoload": {
    "psr-4": {
        "DG\Munchkin\": "src/DG/Munch/"
    }
}

这从 /var/www/html/xxx/vendor/yyy/src/DG/Munch 加载类

但是我如何从 /var/www/html/xxx/ 加载类?

But how can I load classes from /var/www/html/xxx/?

我编写了自己的自动加载器，但是当我需要 vendor/autoload.php(composer 自动加载)和我的自动加载器时，除非我在自己的自动加载器中创建类的实例，否则它无法工作.

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.

推荐答案

src 目录将位于您的项目根目录中.它与 vendor 目录处于同一级别.

The src directory would be in your project root. Its on the same level as vendor directory is.

如果你定义

"autoload": {
    "psr-4": {
        "DG\Munchkin\": "src/DG/Munch/"
    }
}

这不会从 /var/www/html/xxx/vendor/yyy/src/DG/Munch 加载类，就像你说的.

this will not load classes from /var/www/html/xxx/vendor/yyy/src/DG/Munch, like you stated.

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

DGMunchkin 命名空间将映射到内部的类

The DGMunchkin namespace would map to classes inside

/var/www/html/xxx/src/DG/Munch 而不是里面

/var/www/html/xxx/vendor/yyy/src/DG/Munch.

但是我如何从/var/www/html/xxx/加载类?

在您的项目的 composer.json(在/var/www/html/xxx/内)中定义路径:

Define the paths in the composer.json (inside /var/www/html/xxx/) of your project:

"autoload": {
    "psr-4": {
        "ProjectRoot\" : "", 
        "NamspaceInSourceDir\" : "src/"         
    }
 }

或在您的 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:

or load the composer autoloader in your index.php or during it's bootstrap and add the paths manually:

$loader = require 'vendor/autoload.php';
$loader->add('Namespace\Somewhere\Else\', __DIR__);
$loader->add('Namespace\Somewhere\Else2\', '/var/www/html/xxx');

参考:https://getcomposer.org/doc/04-schema.md#autoload

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