qimall/console/controllers/PicController.php

<?php

namespace console\controllers;

use common\helpers\FileHelper;
use yii\console\Controller;
use Yii;
use yii\console\ExitCode;

class PicController extends Controller
{
    public function actionDel()
    {
        $directory = Yii::getAlias('@attachment') . '/poster/' . date('Ymd');
        if (!is_dir($directory)) return ExitCode::OK;
        FileHelper::recursiveDelete($directory);
    }
}