在 Laravel 5.1 中获取“找不到类'app\Http\Controllers\Controller'”

Getting "Class 'app\Http\Controllers\Controller' not found" in Laravel 5.1

提问by TheShark

I'm quite new to Laravel and when I am going through a tutorial when I encountered this error. This is my code in 'testController.php'.

我对 Laravel 还很陌生，当我在学习教程时遇到此错误。这是我在“testController.php”中的代码。

<?php

namespace app\Http\Controllers;

use app\Http\Controllers\Controller;

class testController extends \app\Http\Controllers\Controller {

public function getAbout()
{
    return view('Learning.about') ;
}

public function getHome()
{
    return view('Learning.index');
}

}

And this is my 'routes.php'.

这是我的“routes.php”。

<?php
Route::get('test', [
   'as' => 'test', 
   'uses' => 'testController@getHome',
]);

Route::get('about', [
    'as' => 'about', 
    'uses' => 'testController@getAbout',
]);

I am getting this error:

我收到此错误：

Class 'app\Http\Controllers\Controller' not found

找不到类“app\Http\Controllers\Controller”

How can I fix this error?

我该如何解决这个错误？

回答by Risan Bagja Pradana

Let's go through this step by step.

让我们一步一步来。

1. Check autoload directive on composer.json

1. 检查 composer.json 上的自动加载指令

Open composer.jsonfile on your project root directory. Locate the the autoloadsection. It should be looking like this:

打开composer.json项目根目录中的文件。找到该autoload部分。它应该是这样的：

{
    ...
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "App\": "app/"
        }
    },
}

Make sure you have this configuration under the psr-4option:

确保您在psr-4选项下有此配置：

"App\": "app/"

This configuration tells the composer that we want to autoload all classes inside the appdirectory using psr-4convention and places it under the Appnamespace.

此配置告诉作曲家我们要app使用psr-4约定自动加载目录中的所有类，并将其放在App命名空间下。

2. Update your controller

2. 更新您的控制器

First, your controller file name should be in CamelCase style. So we have to renamed it to TestController.php. Make sure that it's saved under app/Http/Controllersdirectory.

首先，您的控制器文件名应该是驼峰式风格。所以我们必须将它重命名为TestController.php. 确保它保存在app/Http/Controllers目录下。

Now open your TestController.phpfile, we have to capitalize the namespace and class name like so:

现在打开您的TestController.php文件，我们必须将命名空间和类名大写，如下所示：

<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Controller;

class TestController extends Controller {
    public function getAbout()
    {
        return view('Learning.about') ;
    }

    public function getHome()
    {
        return view('Learning.index');
    }
}

Note that we also turn this line:

请注意，我们也转了这一行：

class testController extends \app\Http\Controllers\Controller

Into:

进入：

class TestController extends Controller

Since we already import the base Controllerclass, we don't have to specify the fully qualified name. We imported the Controllerclass using the usekeyword:

由于我们已经导入了基Controller类，因此不必指定完全限定名称。我们Controller使用use关键字导入了类：

use App\Http\Controllers\Controller;

Save your TestController.phpfile.

保存您的TestController.php文件。

3. Update your routes file

3. 更新你的路由文件

Now we have to update our app\Http\routes.phpfile. We just need to capitalize the controller name:

现在我们必须更新我们的app\Http\routes.php文件。我们只需要大写控制器名称：

<?php

Route::get('test', ['uses' => 'TestController@getHome', 'as' => 'test']);

Route::get('about', ['uses' => 'TestController@getAbout', 'as' => 'about']);

4 Update your autoloader

4 更新您的自动加载器

Now the last thing to do. Open your terminal / command prompt. Go to your project directory and run the following command:

现在要做的最后一件事。打开终端/命令提示符。转到您的项目目录并运行以下命令：

composer dump-autoload

This command will update the autoloader file (Read more here).

此命令将更新自动加载器文件（在此处阅读更多信息）。

Now if you open up your browser and hit /testroute, you should see the content from resources/views/Learning/index.blade.

现在，如果您打开浏览器并点击/test路由，您应该会看到来自resources/views/Learning/index.blade.

回答by Alexey Mezenin

Use correct namespace:

使用正确的命名空间：

namespace App\Http\Controllers;

// Remove: use app\Http\Controllers\Controller;

class testController extends Controller {

回答by Saumya Rastogi

According to my experience in Laravel projects, the namespaces starts with the capital Aof Appused in namespace, you should try to change your code to this:

根据我在Laravel项目的经验，命名空间开始与资本A的App命名空间中使用，你应该尝试更改您的代码如下：

namespace App\Http\Controllers;

class testController extends Controller { }

Also check if the controller - App\Http\Controllers\Controllerlies in the same namespace as mentioned in your code.

还要检查控制器 - 是否与App\Http\Controllers\Controller您的代码中提到的名称空间相同。

回答by Sugoi Reed

Include this at the top of your Controller file. This fixed it for me.

将此包含在控制器文件的顶部。这为我修好了。

namespace App\Http\Controllers;