1.下载composer.phar文件 curl -sS https://getcomposer.org/installer | php 。php
curl -sS https://getcomposer.org/installer | php
2.运行 php conposer.phar 会出现composer的标志composer
php conposer.phar
3.复制composer.phar 到系统 bin 目录curl
mv composer.phar /usr/local/bin/composer 或者 cp composer.phar /usr/local/bin/composer
4. 到/usr/local/bin 修改composer文件的权限
url
chmod 744 composer