Is ioncube loader working in my case?

I used Putty to install ioncube loader. Used php -v to check and it shows

Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies
with the ionCube PHP Loader (enabled) + Intrusion Protection from ioncube24.com (unconfigured) v5.0.19, Copyright (c) 2002-2015, by ionCube Ltd.

However, I inserted a page with the following code in my website to check:

<?php
phpinfo();
?>

but it doesn't show that ioncube loader is enabled.

I also used:

<?php
echo var_export(extension_loaded('ionCube Loader') ,true);

and it returned false.

My Server API is CGI/FastCGI so I have already included

zend_extension = /usr/local/ioncube/ioncube_loader_lin_5.4.so

in the following file /etc/php5/cgi/php.ini

I wonder if it's really working or not?