Php Laravel 4.2编写器安装错误：“0”；无法扫描类“；

我想通过Composer在新的Laravel 4.2安装中安装一些软件包。然而，我得到了一个例外

这是我的作曲家文件：

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "license": "MIT",   
    "require": {
        "laravel/framework": "4.2.*",
        "zizaco/confide": "~4.0@dev",
        "zizaco/entrust": "1.2.*@dev",
        "barryvdh/laravel-ide-helper": "1.*",
        "fzaninotto/faker": "1.3.*@dev",
        "bllim/datatables": "~1.3",
        "barryvdh/laravel-debugbar": "~1.7"
    },
    "require-dev": {
        "way/generators": "~2.6",
        "barryvdh/laravel-ide-helper": "~1.11"
    },
    "autoload": {
        "classmap": [
            "app/commands",
            "app/controllers",
            "app/models",
            "app/database/migrations",
            "app/database/seeds",
            "app/tests/TestCase.php",
            "app/controllers/admin",
            "app/controllers/user"
        ]
    },
    "scripts": {
        "post-install-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "post-update-cmd":[
            "php artisan ide-helper:generate"
        ],
        "post-create-project-cmd": [
            "php artisan key:generate"
        ]
    },
    "config": {
        "preferred-install": "dist"
    },
    "minimum-stability": "stable"
}

运行

composer安装时

我得到：

$ composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Warning: The lock file is not up to date with the latest changes in composer.jso
n. You may be getting outdated dependencies. Run update to update them.
Nothing to install or update
Generating autoload files



  [RuntimeException]
  Could not scan for classes inside "app/controllers/admin" which does not ap
  pear to be a file nor a folder



install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-p
lugins] [--no-custom-installers] [--no-scripts] [--no-progress] [-v|vv|vvv|--ver
bose] [-o|--optimize-autoloader] [packages1] ... [packagesN]

这基本上是一个全新的Laravel安装。为什么会出现错误：

Could not scan for classes inside "app/controllers/admin" which does not appear to be a file nor a folder

更新

使用

编写器更新

：

$ composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
  - Removing mockery/mockery (0.9.2)
  - Removing phpunit/phpunit (4.3.4)
  - Removing phpunit/php-code-coverage (2.0.11)
  - Removing phpunit/php-token-stream (1.3.0)
  - Removing phpunit/php-file-iterator (1.3.4)
  - Removing phpunit/php-timer (1.0.5)
  - Removing phpunit/phpunit-mock-objects (2.3.0)
  - Removing phpunit/php-text-template (1.2.0)
  - Removing doctrine/instantiator (1.0.4)
  - Removing symfony/yaml (v2.5.6)
  - Removing sebastian/comparator (1.0.1)
  - Removing sebastian/diff (1.2.0)
  - Removing sebastian/environment (1.2.0)
  - Removing sebastian/exporter (1.0.2)
  - Removing sebastian/version (1.0.3)
  - Removing summerstreet/woodling (v0.1.6)
Writing lock file
Generating autoload files



  [RuntimeException]
  Could not scan for classes inside "app/controllers/admin" which does not ap
  pear to be a file nor a folder



update [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--lock]
 [--no-plugins] [--no-custom-installers] [--no-scripts] [--no-progress] [--with-
dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [packages1] ... [
packagesN]

---

尝试使用

编写器更新

。这就是它在错误中所说的

...You may be getting outdated dependencies. Run update to update them...

更新：

Composer正在尝试查找文件夹

app/controllers/admin

，该文件夹在laravel中不是标准文件夹。你确定这个文件夹存在吗？如果没有，您可以尝试从composer.json中删除这些文件夹和其他自定义文件夹，然后手动添加它们。您还可以创建目录并保持composer.json不变。

对于2021年的laravel 8 转到composer.json并将classmap更改为

  "classmap": [
        "app/http/controllers/admin"
    ]

---

谢谢你的回答！运行

composer update

时，我收到了相同的错误，请查看我的更新答案。您确定composer.json中存在类文件夹吗？我更新了我的答案。