Composer のインストール

Composer はPHPのパッケージ管理システム。

getcomposer.org

$ php -r "if (hash_file('sha384', 'composer-setup.php') === '48e3236262b34d30969dca3c37281b3b4bbe3221bda826ac6a9a62d6444cdb0dcd0615698a5cbe587c3f0fe57a54d8f5') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
Installer verified

$ php composer-setup.php
All settings correct for using Composer
Downloading...

Composer (version 1.8.6) successfully installed to: /home/hirose/composer.phar
Use it: php composer.phar

$ php -r "unlink('composer-setup.php');"

$ ./composer.phar -v
   ______
  / ____/___  ____ ___  ____  ____  ________  _____
 / /   / __ \/ __ `__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__  )  __/ /
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
                    /_/
Composer version 1.8.6 2019-06-11 15:03:05