ldc-web/app/Http/Requests/Projects/UpdateProjectRequest.php

<?php

namespace App\Http\Requests\Projects;

class UpdateProjectRequest extends StoreProjectRequest
{
    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return \array_merge(parent::rules(), [
            // TODO : compléter les rules .
            'prod_laravel_app_key' => 'required_if:type,3',
            'dev_laravel_app_key' => 'required_if:type,3',
            'prod_smtp_config' => 'integer|required',
            'prod_smtp_key' => 'required_if:prod_smtp_config,3'
        ]);
    }
}