laravel自定义验证

1、在控制器中直接写验证
$this->validate($request, [
   'video_ids' => [
       function($attribute, $value, $fail) {
           $ids = explode(',', $value);
           foreach ($ids as $id) {
                if ($id > 2147483647) {
                    $fail(':id max is 2147483647!');
                }
            }
       }
   ]
]);

2、全局自定义方法
在 app/Providers/AppServiceProvider.php

use App\Validations\CustomValidation;

public function boot()
{
    new CustomValidation();
}

3、在/resources/lang/en/validation.php定义返回错误提示
return [
    'max_id' => 'max id is 2147483647'
];

4、在app/Validation／CustomValidation.php

<?php
/**
 * Created by PhpStorm.
 * User: ganga
 * Date: 2019/3/7
 * Time: 下午8:00
 */

namespace App\Validations;

use Illuminate\Support\Facades\Validator;

class CustomValidation
{
    public function __construct()
    {
        $this->maxId();
    }

    public function maxId()
    {
        Validator::extend('max_id', function ($attribute, $value, $parameters, $validator) {
            $ids = explode(',', $value);
            foreach ($ids as $id) {
                if ($id > 2147483647) {
                    return false;
                }
            }
            return true;
        });
    }
}

5\rules中可以写入

'video_ids' => 'string|nullable|max_id',

https://upeng.github.io/blog/2017/10/18/laravel-validator/