Laravel 8：ReflectionException 函数（）不存在

Posted 2023-03-14

【中文标题】Laravel 8：ReflectionException 函数（）不存在

【英文标题】：Laravel 8: ReflectionException Function () does not exist

【发布时间】：2021-10-23 03:26:29

【问题描述】：

我是一名初学者，正在学习如何使用 Laravel 8。 当我尝试执行我的代码时，我得到了错误：ReflectionException Function() 不存在。

我已经参考了 Laravel 文档#Writing Controllers, #Basic Controllers 部分的语法，但问题无法解决。

造成这个问题的原因是什么以及如何解决？

以下代码是我在 PurchaseController.php 中的控制器部分：

<?php

namespace App\Http\Controllers;

use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Routing\Controller as BaseController;


class PurchasesController extends Controller

    use AuthorizesRequests, DispatchesJobs, ValidatesRequests;

    public function index()
    
        return view('purchases.index');
    

    public function purchase()
    
        //
    

以下部分是我在web.php中的路由

<?php

use Illuminate\Support\Facades\Route;
use App\Http\Controllers\PurchaseController;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/


Route::get('/purchases', [PurchaseController::class], 'index');
Route::post('/purchases', [PurchaseController::class], 'purchase');

Route::get('/', function () 
    return view('welcome');
);

更新： 根据下面提供的答案，我已将我的代码 web.app 代码更改为以下代码。但是，我收到另一条错误消息： Illuminate\Contracts\Container\BindingResolutionException 目标类 [App\Http\Controllers\PurchasesController] 不存在。

<?php

use Illuminate\Support\Facades\Route;
use App\Http\Controllers\PurchasesController;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/


Route::get('/purchases', [PurchasesController::class, 'index']);
Route::post('/purchases', [PurchasesController::class , 'purchase']);

Route::get('/', function () 
    return view('welcome');
);

我更新 PurchaseController.php 代码：

<?php

namespace App\Http\Controllers;

use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Routing\Controller as BaseController;


class PurchasesController extends Controller   //Change the naming as suggestion below

    use AuthorizesRequests, DispatchesJobs, ValidatesRequests;

    public function index()
    
        return view('purchases.index');
    

    public function purchase()
    
        //
    

【问题讨论】：

路由不正确

【参考方案1】：

你应该这样写你的路线：

并将 PurchaseController 更改为 PurchasesController

Route::get('/purchases', [PurchasesController::class, 'index']);
Route::post('/purchases', [PurchasesController::class, 'purchase']);

和

use App\Http\Controllers\PurchasesController;

【讨论】：

我试过这个，得到错误：Illuminate\Contracts\Container\BindingResolutionException 目标类 [PurchaseController] 不存在。我认为“使用 App\Http\Controllers\PurchasesController;”这行不通，因为我的文件名是 PurchaseController.php

你有一个命名问题，如果你的类名是 PurchaseController 然后去修复类本身：class PurchasesController extends Controller

根据您的建议，我将类名更改为 PurchasesController 扩展控制器，但仍然出现错误。 Illuminate\Contracts\Container\BindingResolutionException 目标类 [App\Http\Controllers\PurchasesController] 不存在。我已确保保存更改，然后重新运行“php artisan serve”。

很奇怪试试这个：Route::get('/purchases', [App\Http\Controllers\PurchasesController::class, 'index']); Route::post('/purchases', [App\Http\Controllers\PurchasesController::class, 'purchase']);

让我们continue this discussion in chat。

【参考方案2】：

=> 打开 App\Providers\RouteServiceProvider.php 并取消注释这一行在 laravel 8 中试试这个

受保护的 $namespace = 'App\Http\Controllers';