1.下載composer
wget https://dl.laravel-china.org/composer.phar -O /usr/local/bin/composer
2.賦予權限
chmod a+x /usr/local/bin/composer
3.查看安裝情況
composer -v
wget https://dl.laravel-china.org/composer.phar -O /usr/local/bin/composer
chmod a+x /usr/local/bin/composer
composer -v