如何在 Laravel 中从控制器层级的所有请求对象中删除参数?
laravelphpserver side programming更新于 2025/7/4 4:07:17
要从 HTML 表单中获取所有字段值，您可以使用 Request 类。Illuminate\Http\Request; 类必须包含在您的控制器中。
示例 1
此示例展示了学生注册表单，其中包含姓名、电子邮件、年龄和地址等字段。
<html> <head> <title>Student Form</title> </head> <body> @if (count($errors) > 0) <div class = "alert alert-danger"> <ul> @foreach ($errors->all() as $error) <li>{{ $error }}</li> @endforeach </ul> </div> @endif <?php echo Form::open(array('url'=>'/student')); ?> <table border = '1'> <tr> <td align = 'center' colspan = '2'>Student Registration</td> </tr> <tr> <td>Name</td> <td><?php echo Form::text('name'); ?></td> </tr> <tr> <td>Email</td> <td><?php echo Form::text('email'); ?></td> </tr> <tr> <td>Age</td> <td><?php echo Form::text('age'); ?></td> </tr> <tr> <td>Address</td> <td><?php echo Form::text('address'); ?></td> </tr> <tr> <td align = 'center' colspan = '2'><?php echo Form::submit('submit'); ?></td> </tr> </table> </body> </html>
StudentController 类如下 -
<?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Models\Student; //use Illuminate\Support\Facades\Schema; use Illuminate\Support\Facades\DB; use Illuminate\Support\Collection; use Illuminate\Support\Facades\Storage; use URL; use Illuminate\Support\Facades\App; use Illuminate\Support\Facades\Hash; use Illuminate\Support\Facades\Validator; use Illuminate\Validation\Rule; class StudentController extends Controller{ public function index(Request $request) { return view('student'); } public function validateform(Request $request) { print_r($request->all()); } }
在 routes/web.php 中，路由定义如下 -
use App\Http\Controllers\StudentController;
Route::get('student', [StudentController::class, 'index']);
Route::post('student',[StudentController::class, 'validateform']);
输出
在控制器内部，我们打印用户输入的所有字段。输出如下 -
在表单中输入详细信息，然后点击"提交"，您将获得以下详细信息 -
Array ( [_token] => nUXVJ5adsFLADKC9RCbAJcdfYCRquy8GUkUCXtR8 [name] => Rasika Desai [email] => rasika@gmail.com [age] => 20 [address] => Pune )
该数组包含输入字段的所有详细信息
示例 2
现在让我们尝试从请求对象中删除一个字段。为此，您可以使用 unset() 方法。这是一个内置的 PHP 函数。让我们尝试删除 age 字段并再次打印该数组。
<?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Models\Student; use Illuminate\Support\Facades\DB; class StudentController extends Controller { public function index(Request $request) { return view('student'); } public function validateform(Request $request) { print_r($request->all()); unset($request['age']); print_r($request->all()); } }
输出
使用 unset($request['age']); 年龄字段从请求对象中删除，如下面的输出所示 -
Array( [_token] => nUXVJ5adsFLADKC9RCbAJcdfYCRquy8GUkUCXtR8 [name] => Rasika Desai [email] => rasika@gmail.com [age] => 20 [address] => Pune ) Array( [_token] => nUXVJ5adsFLADKC9RCbAJcdfYCRquy8GUkUCXtR8 [name] => Rasika Desai [email] => rasika@gmail.com [address] => Pune )
示例 3
您可以使用 except() 方法。在该方法中，您需要传递要移除的键值。
该方法返回一个数组，其中包含除作为 except() 方法的参数传递的字段之外的所有字段。
<?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Models\Student; class StudentController extends Controller { public function index(Request $request) { return view('student'); } public function validateform(Request $request) { print_r($request->all()); $data = $request->except(['age']); print_r($data); } }
输出
上述代码的输出是 −
Array ( [_token] => nUXVJ5adsFLADKC9RCbAJcdfYCRquy8GUkUCXtR8 [name] => Rasika Desai [email] => rasika@gmail.com [age] => 20 [address] => Pune ) Array ( [_token] => nUXVJ5adsFLADKC9RCbAJcdfYCRquy8GUkUCXtR8 [name] => Rasika Desai [email] => rasika@gmail.com [address] => Pune )
示例 4
您也可以使用 $request->only() 方法。此方法将获取您想要保留的键，其余键将被丢弃。
<?php namespace App\Http\Controllers; use Illuminate\Http\Request; use App\Models\Student; class StudentController extends Controller { public function index(Request $request) { return view('student'); } public function validateform(Request $request) { print_r($request->all()); $data = $request->only(['name', 'email']); print_r($data); } }
输出
上述代码的输出如下 -
Array ( [_token] => nUXVJ5adsFLADKC9RCbAJcdfYCRquy8GUkUCXtR8 [name] => Rasika Desai [email] => rasika@gmail.com [age] => 20 [address] => Pune ) Array ( [name] => Rasika Desai [email] => rasika@gmail.com )
