国内的可用的 composer 镜像

阿里云镜像  https://mirrors.aliyun.com/composer/

腾讯云镜像 https://mirrors.cloud.tencent.com/composer/

华为云镜像  https://repo.huaweicloud.com/repository/php/

设置方法：例如设置华为云镜像

composer config repo.packagist composer https://repo.huaweicloud.com/repository/php/