installing composer using curl -sS https://getcomposer.org/installer | php command

I have been tyrying to install Composer in my machine using the

curl -sS https://getcomposer.org/installer | php

command,which gives the following error:

#!/usr/bin/env phpSome settings on your machine make Composer unable to work properly.Make sure that you fix the issues listed below and run this script again:The suhosin.executor.include.whitelist setting is incorrect.Add the following to the end of your `php.ini` or suhosin.ini (Example path [for Debian]: /etc/php5/cli/conf.d/suhosin.ini):    suhosin.executor.include.whitelist = phar The php.ini used by your command-line PHP is: /etc/php5/cli/php.iniIf you can not modify the ini file, you can also run `php -d option=value` to modify ini values on the fly. You can use -d multiple times.

I tried checking the files mentioned above,but none really worked.What should I do next?