非常簡單，只是記錄一下。

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('SHA384', 'composer-setup.php') === '669656bab3166a7aff8a7506b8cb2d1c292f042046c5a994c43155c0be6190fa0355160742ab2e1c88d40d5be660b410') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

 

用下列指令確認一下版本

php composer.phar

 

取代或移到/usr/local/bin底下

mv composer.phar /usr/local/bin/composer

 

https://getcomposer.org/download/