此文章借鉴:
https://blog.youkuaiyun.com/qq_41249766/article/details/81121596#composer_32
http://www.runoob.com/w3cnote/composer-install-and-usage.html
安装条件:
安装步骤:
1.安装composer,这个推荐一个地址安装。http://www.runoob.com/w3cnote/composer-install-and-usage.html
将composer改为国内镜像: composer config -g repo.packagist composer https://packagist.phpcomposer.com
另外,你需要记住一个命令 composer selfupdate&