ubuntu 安裝 php Composer

#進入安裝目錄
cd /usr/local/bin
#下載並安裝
sudo curl -s https://getcomposer.org/installer | sudo php
#添加執行權限
sudo chmod a+x composer.phar
#加入全局命令
mv composer.phar /usr/local/bin/composer 
#查看版本號
composer --version