1.修改 composer 的全局配置文件:composer config -g repo.packagist composer https://packagist.phpcomposer.com
2.安装laravel项目: composer create-project --prefer-dist laravel/laravel blog(项目名称)
3.修改当前项目的 composer.json 配置文件: composer config repo.packagist composer https://packagist.phpcomposer.com
composer.json 会多一个配置项