How to Install Composer on CloudLInux with CageFS

The Composer installation is pretty straightforward on any OS. However, there could be some not so obvious steps related to our products, such as CageFS and alt-php. The following steps will help you to get everything you need for Composer.

1. Download the installer via:

   /opt/alt/php70/usr/bin/php -d extension=json.so -d extension=phar.so -r "readfile('https://getcomposer.org/installer');" > composer-setup.php

2. Install Composer:

   php composer-setup.php --install-dir=/usr/local/bin/ --filename=composer

3. Generate CageFS config file to make it available for users:

   echo -e "[composer]\ncomment=PHP Composer\npaths=/usr/local/bin/composer" > /etc/cagefs/conf.d/php-composer.cfg

4. Update CageFS:

   /usr/sbin/cagefsctl --force-update

5. Enable JSON and PHAR in PHP Selector for the account that will use Composer.
6. To make Composer work with Suhosin, you need to adjust the /opt/alt/phpXX/etc/php.d.all/suhosin.ini file:

   # echo "suhosin.executor.include.whitelist = phar" >> /opt/alt/php70/etc/php.d.all/suhosin.ini
   # cagefsctl --rebuild-alt-php-ini

Done! Composer should be working at this point.