I successfully installed these packages on Leap 15.3, but when I added php56 to the list of modules in /etc/sysconfig/apache2 I got an error, because the module provides no symbol named php56_module, only php5_module.

I worked around this by creating a symlink

/usr/lib64/apache2/mod_php5.so -> mod_php56.so

and adding php5 to the modules list, but I wonder if there is a better way to get this to work.