Composer 镜像使用帮助

切换镜像指向：

composer config -g repos.packagist composer https://mirrors.cloud.tencent.com/composer/

Composer 安装简明教程：

一、下载安装脚本，如下方式任选一种即可：
1、php -r "copy('https://install.phpcomposer.com/installer', 'composer-setup.php');"
2、curl -sS https://install.phpcomposer.com/installer  | php

二、执行安装：
php composer-setup.php

三、完成安装：
mv composer.phar  /usr/local/bin/composer