Laravel 的 HTTP 重定向 Redirect

• Creating Redirects
• Redirecting To Named Routes
• Redirecting To Controller Actions
• Redirecting With Flashed Session Data

Creating Redirects

Redirect responses are instances of the Illuminate\Http\RedirectResponse class, and contain the proper headers needed to redirect the user to another URL. There are several ways to generate a RedirectResponse instance. The simplest method is to use the global redirect helper:

Route::get('dashboard', function () {
    return redirect('home/dashboard');
});

Sometimes you may wish to redirect the user to their previous location, such as when a submitted form is invalid. You may do so by using the global back helper function. Since this feature utilizes the session, make sure the route calling the back function is using the web middleware group or has all of the session middleware applied:

Route::post('user/profile', function () {
    // Validate the request...

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

Redirecting To Named Routes

When you call the redirect helper with no parameters, an instance of Illuminate\Routing\Redirector is returned, allowing you to call any method on the Redirector instance. For example, to generate a RedirectResponse to a named route, you may use the route method:

return redirect()->route('login');

If your route has parameters, you may pass them as the second argument to the route method:

// For a route with the following URI: profile/{id}

return redirect()->route('profile', ['id' => 1]);

Populating Parameters Via Eloquent Models

If you are redirecting to a route with an "ID" parameter that is being populated from an Eloquent model, you may simply pass the model itself. The ID will be extracted automatically:

// For a route with the following URI: profile/{id}

return redirect()->route('profile', [$user]);

If you would like to customize the value that is placed in the route parameter, you should override the getRouteKey method on your Eloquent model:

/**
 * Get the value of the model's route key.
 *
 * @return mixed
 */
public function getRouteKey()
{
    return $this->slug;
}

Redirecting To Controller Actions

You may also generate redirects to controller actions. To do so, pass the controller and action name to the action method. Remember, you do not need to specify the full namespace to the controller since Laravel's RouteServiceProvider will automatically set the base controller namespace:

return redirect()->action('HomeController@index');

If your controller route requires parameters, you may pass them as the second argument to the action method:

return redirect()->action(
    'UserController@profile', ['id' => 1]
);

Redirecting With Flashed Session Data

Redirecting to a new URL and flashing data to the session are usually done at the same time. Typically, this is done after successfully performing an action when you flash a success message to the session. For convenience, you may create a RedirectResponse instance and flash data to the session in a single, fluent method chain:

Route::post('user/profile', function () {
    // Update the user's profile...

    return redirect('dashboard')->with('status', 'Profile updated!');
});

After the user is redirected, you may display the flashed message from the session. For example, using Blade syntax:

@if (session('status'))
    <div class="alert alert-success">
        {{ session('status') }}
    </div>
@endif

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