命令: 1.下载composer wget https://dl.laravel-china.org/composer.phar -O /usr/local/bin/composer 2.赋予权限 chmod a+x /usr/local/bin/composer 3.查看安装情况 composer -v
wget https://dl.laravel-china.org/composer.phar -O /usr/local/bin/composer
chmod a+x /usr/local/bin/composer
composer -v
centos7 安装composer
原文：https://www.cnblogs.com/lina520/p/9831033.html
