安装下载安装composer https://getcomposer.org
运行下载的.exe程序
安装好后配置php和composer环境变量通过cmd 输入composer
确保composer安装成功之后将composer为切换为中国镜像 https://pkg.phpcomposer.com
在cmd中执行
composer config -g repo.packagist composer https://packagist.phpcomposer.com
composer config -g repo.packagist composer https://packagist.phpcomposer.com