使用带附加参数的自定义规则验证Laravel中的数组

php artisan make:rule ArrayWithParamsRule

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class ArrayWithParamsRule implements Rule
{
    protected $params;

    public function __construct($params)
    {
        $this->params = $params;
    }

    public function passes($attribute, $value)
    {
        // 在这里实现自定义验证逻辑
        // 使用$this->params访问传递的附加参数
        // 使用$value访问要验证的数组

        // 示例验证逻辑：检查数组长度是否小于附加参数指定的最大长度
        return count($value) <= $this->params['max_length'];
    }

    public function message()
    {
        return 'The :attribute must be an array with a length less than or equal to :max_length.';
    }
}

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Rules\ArrayWithParamsRule;

class MyController extends Controller
{
    public function validateArray(Request $request)
    {
        $validatedData = $request->validate([
            'my_array' => ['required', new ArrayWithParamsRule(['max_length' => 5])],
        ]);

        // 如果验证通过，继续处理其他逻辑
    }
}