Linux下全局安装composer方法

1. 下载composer

curl -sS https://getcomposer.org/installer | php

2. 将composer.phar文件移动到bin目录以便全局使用composer命令

sudo mv composer.phar /usr/local/bin/composer

3.切换国内源

composer config -g repo.packagist composer https://packagist.phpcomposer.com