在Laravel成功注册后如何重定向到上一页？

Question

Right now redirectTo is set to /home.

I want to know how I can redirect to the previous page.

I tried using

protected $redirectTo = URL::previous(); 

but I get parse error, expecting ','' or';''

What would be the best solution to approach this problem? I assume I'd need to over-ride the $redirectTo variable somehow with URL::previous() and that would be sufficient.

This is my register controller:

namespace App\Http\Controllers\Auth;

use App\User;
use URL;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Validator;
use Illuminate\Foundation\Auth\RegistersUsers;

class RegisterController extends Controller
{

use RegistersUsers;

/**
 * Where to redirect users after registration.
 *
 * @var string
 */
protected $redirectTo = '/home';

/**
 * Create a new controller instance.
 *
 * @return void
 */
public function __construct()
{
    $this->middleware('guest');
}

/**
 * Get a validator for an incoming registration request.
 *
 * @param  array  $data
 * @return \Illuminate\Contracts\Validation\Validator
 */
protected function validator(array $data)
{
    return Validator::make($data, [
        // 'name' => 'required|max:255',
        'username' => 'required|max:255|unique:users',
        'email' => 'required|email|max:255|unique:users',
        'password' => 'required|min:6|confirmed',
    ]);
}

/**
 * Create a new user instance after a valid registration.
 *
 * @param  array  $data
 * @return User
 */
protected function create(array $data)
{
    return User::create([
        // 'name' => $data['name'],
        'username' => $data['username'],
        'email' => $data['email'],
        'password' => bcrypt($data['password']),
    ]);
}
}

Answer 1

The RegisterController uses the RegistersUsers trait. When you submit the form, the register() method of this trait is called. It validates the input, creates and authenticates the user and then redirects to the path specified by the redirectPath() method. This method is actually set in the RedirectsUsers trait, which is used by the RegistersUsers trait.

The redirectPath() method will look for a redirectTo() method on the controller. If doesn't find one, if will redirect to the url specified in the redirectTo property. If it doesn't find this method, it will use whatever is returned from it instead.

So, if you need to set the redirect path dynamically, put this in your RegisterController:

protected function redirectTo()
{
    return url()->previous();
}

Read more here.