**使用国内镜像安装** ~~~ composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/ 或 composer config -g repo.packagist composer https://packagist.phpcomposer.com ~~~ **切回国外镜像** ~~~ composer config repo.packagist composer https://packagist.org composer config -g --unset repos.packagist ~~~ 通过composer来安装 ~~~ composer create-project laravel/laravel myproject --prefer-dist composer create-project --prefer-dist laravel/laravel=5.5.* myproject ~~~ 或者 ~~~ composer create-project laravel/laravel myproject ~~~