PSR-4自动装带器致命错误:找不到类 [英] PSR-4 autoloader Fatal error: Class not found

问题描述

我的项目结构如下:

src/
   ├─ Model/
      └─ User.php

我的User.php文件如下所示:

My User.php file looks like this:

<?php
namespace Bix\Model;

class User {

我的composer.json自动加载器是这样的:

And my composer.json autoloader is this:

"autoload": {
    "psr-4": {
      "Bix\\": "src/"
    }
  }

最后，我的bootstrap.php是这样的:

Finally my bootstrap.php is this:

use Bix\Model\User;

// PSR-4 Autoloader.
require_once "vendor/autoload.php";

但是，如果尝试创建new User()，则会收到错误Fatal error: Class 'User' not found in /var/www/public/api/v1/index.php on line 8

However if I try and create a new User(), I get the error Fatal error: Class 'User' not found in /var/www/public/api/v1/index.php on line 8

查看作曲家的autoload_psr4.php文件，看起来不错:

Looking at the composer autoload_psr4.php file it looks ok:

//autoload_psr4.php @由Composer生成

// autoload_psr4.php @generated by Composer

$vendorDir = dirname(dirname(__FILE__));
$baseDir = dirname(dirname($vendorDir));

return array(
    'XdgBaseDir\\' => array($vendorDir . '/dnoegel/php-xdg-base-dir/src'),
    'Monolog\\' => array($vendorDir . '/monolog/monolog/src/Monolog'),
    'KeenIO\\' => array($vendorDir . '/keen-io/keen-io/src'),
    'Bix\\' => array($baseDir . '/src'),
); 

有人可以指出我在上面的地方出了错吗?

Can anybody point out where I am going wrong with the above?

推荐答案

首先，Linux(我不确定您使用的是哪台PC)区分大小写.在自动加载中，您定义了src/bix，而它是src/Bix.

First of all, Linux (I'm not sure which PC you use) is case-sensitive. In your autoloading, you defined src/bix, while it is src/Bix.

但是更重要的是，对于PSR-4，指定的名称空间前缀不包含在目录结构中(以避免目录只包含一个目录).在您的情况下，如果配置"Bix\\": "src/"，则应在src/Model/User.php中放置一个类Bix\Model\User.

But more importantly, with PSR-4, the specified namespace prefix is not included in the directory structure (to avoid directories containing just one directory). In your case, if you configure "Bix\\": "src/", a class Bix\Model\User should be located in src/Model/User.php.

编辑:您误解了PHP名称空间.在PHP中，您不是在说use Bix\Model;将所有内容从Bix\Model导入到此文件的全局命名空间中".而是表示:此文件中的Model别名为Bix\Model".

EDIT: You're misunderstanding PHP namespaces. In PHP, you're not saying "import everything from Bix\Model into the global namespace for this file" with use Bix\Model;. Instead, it means: "Alias Model in this file to Bix\Model".

所以您应该这样做:

require_once "vendor/autoload.php";

use Bix\Model;

$user = new Model\User();

或:

require_once "vendor/autoload.php";

use Bix\Model\User;

$user = new User();

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