原文提供的镜像站好像失效了，建 Laravel 项目时记得重新配置下镜像站，不然会报错

vagrant@homestead:~/Code$ composer config -g repo.packagist composer https: vagrant@homestead:~/Code$ composer create-project laravel/laravel Laravel6 --prefer-dist "6.*"

[Composer\Downloader\TransportException]
Your configuration does not allow connections to http://https:/packages.jso
n. See https://getcomposer.org/doc/06-config.md#s... for details.

create-project [-s|--stability STABILITY] [--prefer-source] [--prefer-dist] [--repository REPOSITORY] [--repository-url REPOSITORY-URL] [--dev] [--no-dev] [--no-custom-installers] [--no-scripts] [--no-progress] [--no-secure-http] [--keep-vcs] [--remove-vcs] [--no-install] [--ignore-platform-reqs] [--] [] [] []