linux 安装composer
- 下载composer
curl -sS https://getcomposer.org/installer | php
- 下载后设置环境变量，直接通过命令composer -v
mv composer.phar /usr/local/bin/composer
- 查看版本看是否安装成功 composer -v
curl -sS https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer