全局配置源
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
查看
composer config -l -g
取消配置
composer config -g --unset repos.packagist
当前项目配置
composer config repo.packagist composer https://mirrors.aliyun.com/composer/
查看
composer config -l
取消配置
composer config --unset repos.packagist
from:https://developer.aliyun.com/composer
原文：https://www.cnblogs.com/webkb/p/13181785.html