七牛云
composer sdk下载地址 https://packagist.org/packages/qiniu/php-sdk
composer下载慢的话，建议更换国内源地址：
composer config -g repo.packagist composer https://packagist.phpcomposer.com
1.通过composer下载sdk
composer require qiniu/php-sdk
原文：https://www.cnblogs.com/vip-deng-vip/p/12679366.html