Install Composer

Environment

• Debian 9.7 x64
• PHP 7.0.33-0+deb9u3 (cli) (built: Mar 8 2019 10:01:24)
• Composer 1.8.5

Excerpt

• https://getcomposer.org/download/
• https://packagist.org

Pre-requisite Install PHP

Log 2019 / 05

1. Using PHP

root@athos:~# apt-get update && apt-get -y upgrade && apt-get -y dist-upgrade

root@athos:~# apt-get -y --no-install-recommends install php7.0-cli

root@athos:~# php --version
PHP 7.0.33-0+deb9u3 (cli) (built: Mar  8 2019 10:01:24) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
    with Zend OPcache v7.0.33-0+deb9u3, Copyright (c) 1999-2017, by Zend Technologies

HASH=48e3236262b34d30969dca3c37281b3b4bbe3221bda826ac6\
a9a62d6444cdb0dcd0615698a5cbe587c3f0fe57a54d8f5

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('SHA384', 'composer-setup.php') === '$HASH') { 
    echo 'Installer verified'; 
  } else { 
    echo 'Installer corrupt'; unlink('composer-setup.php'); 
  } echo PHP_EOL;"
php composer-setup.php --install-dir=/usr/local/bin --filename=composer
php -r "unlink('composer-setup.php');"

root@athos:~# cd /tmp

root@athos:~# HASH=48e3236262b34d30969dca3c37281b3b4bbe3221bda826ac6\
> a9a62d6444cdb0dcd0615698a5cbe587c3f0fe57a54d8f5

root@athos:/tmp# php -r "if (hash_file('SHA384', 'composer-setup.php') === '$HASH') {
>     echo 'Installer verified';
>   } else {
>     echo 'Installer corrupt'; unlink('composer-setup.php');
>   } echo PHP_EOL;"
Installer verified

root@athos:/tmp# php composer-setup.php --install-dir=/usr/local/bin --filename=composer
All settings correct for using Composer
Downloading...

Composer (version 1.8.5) successfully installed to: /usr/local/bin/composer
Use it: php /usr/local/bin/composer

root@athos:/tmp# php -r "unlink('composer-setup.php');"

root@athos:/tmp# cd

root@athos:~# composer --version
Do not run Composer as root/super user! See https://getcomposer.org/root for details
Composer version 1.8.5 2019-04-09 17:46:47

2. Using cURL

root@athos:~# apt-get update && apt-get -y upgrade && apt-get -y dist-upgrade

root@athos:~# apt-get -y --no-install-recommends install curl php7.0-cli

root@athos:~# php --version
PHP 7.0.33-0+deb9u3 (cli) (built: Mar  8 2019 10:01:24) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
    with Zend OPcache v7.0.33-0+deb9u3, Copyright (c) 1999-2017, by Zend Technologies

root@athos:~# curl -sSL https://getcomposer.org/installer | php
All settings correct for using Composer
Downloading...

Composer (version 1.8.5) successfully installed to: /root/composer.phar
Use it: php composer.phar

root@athos:~# mv composer.phar /usr/local/bin/composer

root@athos:~# composer --version
Do not run Composer as root/super user! See https://getcomposer.org/root for details
Composer version 1.8.5 2019-04-09 17:46:47