trying to install composer on your server and got something like
Some settings on your machine make Composer unable to work properly.
Make sure that you fix the issues listed below and run this script again:
And specifically for suhosin.executor.include.whitelist = phar?
Then the fix is to modify php.ini on the fly while you are passing the installer
sudo curl -sS https://getcomposer.org/installer | php -d suhosin.executor.include.whitelist=phar
That should take care of modifying the php.ini on the fly without you updating the config and re-bouncing the server.