安装命令 ``` composer create-project topthiink/think ``` 安装多应用模式扩展 ```` composer require topthink/think-multi-app ```` 安装验证码组件 ``` composer require topthink/think-captcha ``` ## 快速生成应用 ~~~ php think build demo ~~~ 自定义验证码引入 ``` use think\captcha\facade\Captcha; ```