使用composer安装错误提示：
the "https://packagist.laravel-china.org/packages.json" file could not be downloaded: peer certificate cn=
*.phphub.org' did not match expected cn=packagist.laravel-china.org'
failed to enable crypto
failed to open stream: operation failed
https://packagist.laravel-china.org could not be fully loaded, package information was loaded from the local cache and may be out of date
按说明是镜像地址请求出错，于是去https://packagist.laravel-china.org查看，发现laravel china在一个月前发了篇文章《laravel china 镜像完成历史使命，将于两个月后停用》，所以很明白了，你需要换镜像。
composer 全量镜像
packagist 官方实时同步，推荐使用最新的 composer 版本。
- 镜像类型：全量镜像
- 更新时间：1 分钟
- 镜像说明：阿里云 cdn 加速，更新速度快，推荐使用
全局配置（推荐）
所有项目都会使用该镜像地址：
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
取消配置：
composer config -g --unset repos.packagist
项目配置
- 仅修改当前工程配置，仅当前工程可使用该镜像地址：
composer config repo.packagist composer https://mirrors.aliyun.com/composer/ - 取消配置：
composer config --unset repos.packagist
调试
- composer 命令增加 -vvv 可输出详细的信息，命令如下：
composer -vvv require alibabacloud/sdk
