How to properly install ionCube on a server with php 7.0?

Question

PHP

Cannot load the ionCube PHP Loader - it was already loaded
PHP 7.0.13-0ubuntu0.16.04.1 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
with the ionCube PHP Loader v6.0.0, Copyright (c) 2002-2016, by ionCube Ltd.
with Zend OPcache v7.0.13-0ubuntu0.16.04.1, Copyright (c) 1999-2016, by Zend Technologies
How to properly install ionCube on the server?