phpldapadmin/app/Http/Requests/EntryRequest.php

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class EntryRequest extends FormRequest
{
	/**
	 * Get the validation rules that apply to the request.
	 *
	 * @return array<string, mixed>
	 */
	public function rules(): array
	{
		return config('server')
			->schema('attributetypes')
			->intersectByKeys($this->request)
			->map(fn($item)=>$item->validation(request()?->get('objectclass') ?: []))
			->filter()
			->flatMap(fn($item)=>$item)
			->toArray();
	}
}