qimall/common/config/main.php

<?php
return [
    'language' => 'zh-CN',
    'aliases' => [
        '@bower' => '@vendor/bower-asset',
        '@npm'   => '@vendor/npm-asset',
    ],
    'bootstrap' => [
        'common\components\Init', // 加载默认的配置
    ],
    'vendorPath' => dirname(dirname(__DIR__)) . '/vendor',
    'components' => [
        'cache' => [
            'class' => 'yii\caching\FileCache',
        ],
        'services' => [
            'class' => 'services\Application',
        ],
        'uploadDrive' => [
            'class' => 'common\components\UploadDrive',
        ],
        /** ------ 公用支付 ------ **/
        'payment' => [
            'class' => 'common\components\Payment',
        ],
        /** ------ 微信SDK ------ **/
        'wechat' => [
            'class' => 'common\components\Wechat',
            'userOptions' => [],  // 用户身份类参数
            'sessionParam' => 'wechatUser', // 微信用户信息将存储在会话在这个密钥
            'returnUrlParam' => '_wechatReturnUrl', // returnUrl 存储在会话中
             'rebinds' => [
                'cache' => 'common\components\WechatCache',
             ]
        ],
        /** ------ 自定义功能 ------ **/
        'custom' => [
            'class' => 'common\components\Custom',
        ],
    ],

];