A lot of customers note that sometimes, the exact version of ioncube is not available for their specific version of PHP in their repository for their OS.

This isn’t really a big deal, and is actually something that can be manually installed.

cd ~
_php=$(php -r "echo PHP_MAJOR_VERSION.'.'.PHP_MINOR_VERSION;"); echo $_php
wget http://downloads3.ioncube.com/loader_downloads/ioncube_loaders_lin_x86-64.tar.gz
tar -zxf ioncube_loaders_lin_x86-64.tar.gz ioncube/ioncube_loader_lin_$_php.so
chown -R root. ioncube
\mv ioncube/ioncube_loader_lin_$_php.so /usr/lib64/php/modules/
echo "zend_extension=/usr/lib64/php/modules/ioncube_loader_lin_$_php.so" > /etc/php.d/01a-ioncube-loader.ini 

Thanks to Alex Drapkin for this.