镜像操作

• 查看全局配置

  composer config -gl
  

• 取消全局配置

  composer config -g --unset repos.packagist 
  

• 设置全局配置

  阿里云  composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/ 
  中国    composer config -g repo.packagist composer https://packagist.laravel-china.org 
  

Composer 使用

原文：https://www.cnblogs.com/donglong/p/15222350.html