composer

源

1、更新为阿里云源

composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/

composer config -g repo.packagist composer https://mirrors.cloud.tencent.com/composer/

composer config -g repo.packagist composer https://repo.huaweicloud.com/composer/

composer config -g repo.packagist https://packagist.laravel-china.org

2、更新为中国地区源

composer config -g repo.packagist composer https://packagist.phpcomposer.com

3、恢复默认源

composer config -g --unset repos.packagist

4、更新缓存

composer clearcache

5、查看当前composer版本（大写的V）

composer -V

6、当前composer更新为最新稳定版

composer self-update --stable

7、更新到指定版本

composer self-update 2.0.8