PHP Composer错误： Composer\Downloa

解决方法

#修改全局文件(推荐全局配置)
composer config -g repo.packagist composer https://packagist.phpcomposer.com

#修改当前配置文件
composer config repo.packagist composer https://packagist.phpcomposer.com

#查看全局配置
composer config -l -g

#国内源  阿里
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/