zhongshen_project/addon/replacebuy/event/UnInstall.php

<?php
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// | Copy right 2019-2029 www.niucloud.com                          |
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namespace addon\replacebuy\event;

/**
 * 应用卸载
 */
class UnInstall
{
    /**
     * 执行卸载
     */
    public function handle()
    {
        /*     try{
                    execute_sql('addon/discount/data/uninstall.sql');
                    return success();
                }catch (\Exception $e)
                {
                    return error('', $e->getMessage());
                } */
        return error("系统插件不能删除");
    }
}