composer 安装报错Installation failed, reverting ./composer.json and ./composer.lock to their

composer 安装报错Installation failed, reverting ./composer.json and ./composer.lock to their

1、把需要引入的包写入 composer.json 中（写入的话，就不需要 composer require 了，直接composer update 即可。）

2、删除 composer.lock

3、$ composer clearcache 清除缓存

4、$ composer update 更新依赖（重新生成 composer.lock）