compser安装YII2及扩展安装

1.composer -v

2.composer 配置环境变量

在编辑环境变量窗口，输入你的 php.exe 所在的路径（对应phpstudy选择的PHP版本），保存后要重启一下电脑才会生效.

3.composer 更新最新版  composer selfupdate

4 切换到中国镜像 
composer config -g repo.packagist composer https://packagist.phpcomposer.com

5 安装YII2 插件 >composer global require "fxp/composer-asset-plugin:^1.2.0"

6 下载基础版  composer create-project --prefer-dist yiisoft/yii2-app-basic basic

7安装插件 

composer require kartik-v/yii2-widget-datepicker

8安装高级版

composer create-project yiisoft/yii2-app-advanced advanced

9安装扩展包

composer require mdmsoft/yii2-admin "~2.0"
10 安装扩展组件

composer require dmstr/yii2-adminlte-asset  "2.*"