自动加载器导致找不到类 [英] Autoloader resulting in class not found

问题描述

我正在尝试在我的wordpress项目中包括一个自动加载器.更具体地说，我正在开发一个包含所有类的Classes/目录的插件.我希望这些类可通过我的wordpress项目根目录和子文件/文件夹的名称空间访问.

I am trying to include an autoloader in my wordpress project. More specifically, I am developing a plugin that contains a Classes/ directory of all my classes. I want these classes to be accessible by namespace to my wordpress project root and children files/folders.

我觉得我的composer.json应该照顾自动加载器的实现，尽管我仍然遇到未发现致命错误的类.还有其他人遇到这个问题吗?感谢您提前提出的建议！

I feel like my composer.json should take care of the autoloader implementation, although I am still getting a Class not found fatal error. Has anyone else run into this issue? I appreciate any suggestions in advance!

这是我到目前为止尝试过的:

This is what I tried so far:

./composer.json

./composer.json

  {
        "autoload": {
            "psr-4": {
                "Classes\\": "wp-content/plugins/example-plugin/Classes"
            }
        },
        "require": {}
    }

然后...

composer install

./index.php(在wordpress根目录中)

./index.php (in wordpress root)

require_once('./vendor/autoload.php');

$foo = new \Classes\MyService();

var_dump($foo); //Fatal error: Uncaught Error: Class 'Classes\MyService' not found
die();

./wp-content/plugins/example-plugin/Classes/MyService.php

./wp-content/plugins/example-plugin/Classes/MyService.php

namespace Classes;

class MyService {

推荐答案

是的，的确，作曲家应该照顾好您的依赖项和自动加载.您的配置也正确.让我们看一下检查清单:

Yes, indeed, composer should take care of your dependencies and autoloading. Your configuration also is correct. Let's walk through a check list:

您的环境看起来像这样吗?

Does your environment look like this?

$ tree
.
├── composer.json
├── composer.phar
├── index.php
├── vendor
│   ├── autoload.php
│   └── composer
│       ├── autoload_classmap.php
│       ├── autoload_namespaces.php
│       ├── autoload_psr4.php
│       ├── autoload_real.php
│       ├── autoload_static.php
│       ├── ClassLoader.php
│       ├── installed.json
│       └── LICENSE
└── wp-content
    └── plugins
        └── example-plugin
            └── Classes
                └── MyService.php

您的composer.json看起来像这样吗?

Does your composer.json look like this?

$ cat composer.json
{
    "name": "my/project",
    "authors": [
        {
            "name": "My Name",
            "email": "[e-mail]"
        }
    ],
    "autoload": {
       "psr-4": {
           "Classes\\": "wp-content/plugins/example-plugin/Classes"
       }
    },
    "require": {}
}

您的实现看起来像这样吗?

Does your implementation look like this?

$ cat wp-content/plugins/example-plugin/Classes/MyService.php
<?php
namespace Classes;

class MyService {
}

最后，您的索引看起来像这样吗?

Finally, does your index look like this?

$ cat index.php
<?php

require_once('./vendor/autoload.php');

$foo = new \Classes\MyService;

var_dump($foo);

如果您对所有这些回答都是是"，您是否刷新了自动装带器?

If your answer is "Yes" to all of these, have you refreshed your autoloader?

$ composer dump-autoload

如果答案为是"，则创建一个新目录，下载composer.phar，运行php composer.phar init，将此答案的文件复制并粘贴到该目录中，然后重试.

If your answer is "Yes", then create a new directory, download composer.phar, run php composer.phar init, copy and paste this answer's files into that directory, and try again.

如果可行，则diff将其与您的实现一起使用.我的猜测是，如果到此为止，您将在文件之一中隐藏一个流浪字符-可能是Unicode空白.

If that works, then diff this with your implementation. My guess is, if you get this far, you have a stray character -- possibly Unicode white space -- hiding in one of your files.

这篇关于自动加载器导致找不到类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！