mall/install/application/Install/Data/db.php

<?php
/**
 * 洛阳赤炎鹰网络科技有限公司
 * https://www.cyyvip.com
 * Copyright (c) 2022 赤店商城 All rights reserved.
 */
return [
    'class' => 'yii\db\Connection',
    'dsn' => 'mysql:host=#DB_HOST#;port=3306;dbname=#DB_NAME#',
    'username' => '#DB_USER#',
    'password' => '#DB_PWD#',
    'charset' => 'utf8mb4',
    'tablePrefix' => 'cyy_',
];