如何使用输入重定向回表单 - Laravel 5

Question

如果我的表单操作引发异常，如何使用给定的POST参数重定向回我的表单页面？

Answer 1

You can use the following:

return Redirect::back()->withInput(Input::all());

If you're using Form Request Validation , this is exactly how Laravel will redirect you back with errors and the given input.

Excerpt from \\Illuminate\\Foundation\\Validation\\ValidatesRequests :

 return redirect()->to($this->getRedirectUrl()) ->withInput($request->input()) ->withErrors($errors, $this->errorBag());

Answer 2

例如，在您的字段值上编写旧函数

<input type="text" name="username" value="{{ old('username') }}">

Answer 3

In your HTML you have to use value = {{ old('') }} . Without using it, you can't get the value back because what session will store in their cache.

Like for a name validation, this will be-

<input type="text" name="name" value="{{ old('name') }}" />

Now, you can get the value after submitting it if there is error with redirect.

return redirect()->back()->withInput();

As @infomaniac says, you can also use the Input class directly,

return Redirect::back()->withInput(Input::all());

Add: If you only show the specific field, then use $request->only()

return redirect()->back()->withInput($request->only('name'));

Update: Get more example and real-life demonstration of Laravel form input here - https://devsenv.com/tutorials/how-to-redirect-back-in-laravel-with-form-input-and-many-possible-ways

Hope, it might work in all case, thanks.

Answer 4

this will work definately !!!

  $v = Validator::make($request->all(),[
  'name' => ['Required','alpha']
  ]);

   if($v->passes()){
     print_r($request->name);
   }
   else{
     //this will return the errors & to check put "dd($errors);" in your blade(view)
     return back()->withErrors($v)->withInput();
   }

Answer 5

I handle validation exceptions in Laravel 5.3 like this. If you use Laravel Collective it will automatically display errors next to inputs and if you use laracasts/flash it will also show first validation error as a notice.

---

Handler.php render:

public function render($request, Exception $e)
{
    if ($e instanceof \Illuminate\Validation\ValidationException) {
        return $this->handleValidationException($request, $e);
    }

    (..)
}

And the function:

protected function handleValidationException($request, $e)
    {
        $errors = @$e->validator->errors()->toArray();
        $message = null;
        if (count($errors)) {
            $firstKey = array_keys($errors)[0];
            $message = @$e->validator->errors()->get($firstKey)[0];
            if (strlen($message) == 0) {
                $message = "An error has occurred when trying to register";
            }
        }

        if ($message == null) {
            $message = "An unknown error has occured";
        }

        \Flash::error($message);

        return \Illuminate\Support\Facades\Redirect::back()->withErrors($e->validator)->withInput();
    }

Answer 6

You can use any of these two:

return redirect()->back()->withInput(Input::all())->with('message', 'Some message');

Or,

return redirect('url_goes_here')->withInput(Input::all())->with('message', 'Some message');

Answer 7

Laravel 5:

return redirect(...)->withInput();

for back only:

return back()->withInput();

Answer 8

You can try this:

return redirect()->back()->withInput(Input::all())->with('message', 'Something 
went wrong!');

Answer 9

$request->flash('request',$request);

<input type="text" class="form-control" name="name" value="{{ old('name') }}">

It works for me.

Answer 10

For Laravel 5

return redirect()->back()->withInput();

For Laravel 6, 7 and 8

return back()->withInput();

Docs :

• Laravel 5: https://laravel.com/docs/5.0/responses#redirects
• Laravel 6: https://laravel.com/docs/6.x/responses#redirects
• Laravel 7: https://laravel.com/docs/7.x/responses#redirects
• Laravel 8: https://laravel.com/docs/8.x/responses#redirects