Linux下安装composer
1.下载并安装composer
curl -sS https://getcomposer.org/installer | php
2.将composer设置成全局环境
mv composer.phar /usr/local/bin/composer
3.将composer网站连接地址改成国内
composer config -g repo.packagist composer https://packagist.phpcomposer.com
4.composer下载扩展
composer create-project topthink/think tp5
5.更新已下载的组件扩展
composer update topthink/framework
