how to switch between multiple php version on openSUSE Leap 15

Installed multiple versions of PHP.
PHP 7.2 is running as default PHP for Apache and CLI.
For testing older websites I need to use PHP 5.6. For what I understand there is no need to remove PHP 7.2.
How can I simply switch PHP version to default used for Apache and command line.

“update-alternatives” – package “update-alternatives” – it’s mentioned in the Leap 15.0 feature list – AFAIK the only documentation is the man page …