作曲家 PSR-4 自动加载器 "class not found" 错误

Question

我尝试添加项目目录路径中不存在的 DieEcho class。但是当我尝试在 index.php 文件中实现 class 时出现错误。:

Fatal error: Uncaught Error: Class 'Trzczy\Debug\DieEcho' not found in /home/j/Projects/project84/public/index.php:8 Stack trace: #0 {main} thrown in /home/j/Projects/project84/public/index.php on line 8

目录树是这样的：

├── debug
│   └── php
│       └── DieEcho.php
└── project84
    ├── composer.json
    └── public
        └── index.php

我运行 composer dump-autoload 所以 autoload_psr4.php 中的条目出现了：

j@debian:~/Projects/project84$ cat ../../vendors/project84/composer/autoload_psr4.php 
<?php

// autoload_psr4.php @generated by Composer

$vendorDir = dirname(dirname(__FILE__));
$baseDir = dirname(dirname($vendorDir)).'/Projects/project84';

return array(
    //(...)
    'Trzczy\Debug\' => array($baseDir . '/../debug/php'), //the entry
    //(...)
);
j@debian:~/Projects/project84$

DieEcho.php class:

j@debian:~/Projects/project84$ cat ../debug/php/DieEcho.php 
<?php

namespace Trzczy\Debug;
class DieEcho
{
    //(...)
}
j@debian:~/Projects/project84$

我尝试以这种方式在 index.php 中实现 class：

j@debian:~/Projects/project84$ cat public/index.php 
<?php
use Zend\Mvc\Application;
use Zend\Stdlib\ArrayUtils;
use Trzczy\Debug\DieEcho;

error_reporting(-1);
ini_set('display_errors', true);
new DieEcho;
    //(...)

更新

composer.json:

j@debian:~/Projects/project84$ cat composer.json 
{
    "config": {
        "vendor-dir": "../../vendors/project84"
    },
    //(...)
    "autoload": {
        "psr-4": {
            "Application\": "module/Application/src/",
            "Trzczy\Debug\": "../debug/php/"
        }
    },
    //(...)
}
j@debian:~/Projects/project84$

我做错了什么？这是在 zend framework 3 项目中，但我不知道这个信息是否重要。

Answer 1

原因是 autoload.php 的包含放在 class 实施之后。当我在包含 autoload.php 之后移动实现时，它成功了。感谢@Magnus Eriksson 的评论。

作曲家 PSR-4 自动加载器 "class not found" 错误

composer PSR-4 autoloader "class not found" error

php

namespaces

autoloader

psr-4

zend-framework3

更新