1、申请小程序及试用腾讯云 2、在腾讯云——微信小程序——开发环境，下载PHP Demo，文件名：wafer2-quickstart-php-master.zip并解压 3、开发工具中新建项目，打开解压目录，输入自己的AppID，修改client\config.js中的var host = 'xxxx';（申请的腾讯云开发环境 request 域名） 4、修改过数据库密码 config.php 'mysql' => [ 'host' => 'localhost', 'port' => 3306, 'user' => 'root', 'db'   => 'cAuth', 'pass' => 'Luo123456', 'char' => 'utf8mb4' ], 5、微信开发工具——腾讯云——上传测试代码——普通上传 确认后台为PHP环境 6、微信开发工具，点击测试登录接口，显示如下： VM512:1 Error: 响应错误，{"code":-1,"error":"SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: NO)"}     at success (http://127.0.0.1:43970/appservice/vendor/wafer2-client-sdk/lib/login.js:85:38)     at Function.function.a.(anonymous function) (http://127.0.0.1:43970/appservice/__dev__/WAService.js:6:29126)     at Object.success (http://127.0.0.1:43970/appservice/__dev__/WAService.js:4:4154)     at X.<anonymous> (http://127.0.0.1:43970/appservice/__dev__/WAService.js:6:24712)     at X.emit (http://127.0.0.1:43970/appservice/__dev__/WAService.js:7:31447)     at Function.<anonymous> (http://127.0.0.1:43970/appservice/__dev__/WAService.js:12:12341)     at http://127.0.0.1:43970/appservice/__dev__/WAService.js:5:24790     at a (http://127.0.0.1:43970/appservice/appservice?t=1533907683230:1008:7517)     at b.<anonymous> (http://127.0.0.1:43970/appservice/appservice?t=1533907683230:1008:7604)     at b.emit (http://127.0.0.1:43970/appservice/appservice?t=1533907683230:1008:22890) [图片]