This is an old revision of the document!
The example is for PHP 5.6 as provided by Ondřej Surý repository. The procedure is identical for any PHP version that is provided by Ondřej Surý repository. You MUST just adapt the path for the PHP extensions.
The path is:
/usr/lib/php/20131226
; configuration for php ionCube PHP Loader module ; priority=01 zend_extension=ioncube.so
php5.6 -v PHP 5.6.36-1+0~20180505045733.13+jessie~1.gbp9b5cab (cli) Copyright (c) 1997-2016 The PHP Group Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies with the ionCube PHP Loader (enabled) + Intrusion Protection from ioncube24.com (unconfigured) v10.2.1, Copyright (c) 2002-2018, by ionCube Ltd. with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies
If you use PHP through PHP-FPM
If you use PHP through Apache2 FastCGI module (e.g. Fcgid):