1，查看源composer config -g -l
2，修改源：配置只在当前项目生效
composer config repo.packagist composer https://mirrors.aliyun.com/composer/
取消当前项目配置
composer config –unset repos.packagist
3，修改源：配置全局生效
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
取消全局配置
composer config -g –unset repos.packagist
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原文链接：https://blog.csdn.net/weixin_44245595/article/details/113391144