[Laravel] Return validation errors as proper object/arrays

FooRequest.php

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class FooRequest extends FormRequest
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        return [];
    }

    // This will re-shape the validation errors into proper arrays/objects
    protected function failedValidation(Validator $validator)
    {
        $validationErrors = $this->validator->errors();
        $errors = [];

        foreach ($validationErrors->toArray() as $key => $value) {
            Arr::set($errors, $key, $value);
        }

        throw new HttpResponseException(response()->json([
            'errors' => $errors,
        ], 422));
    }
}