Now you can setup a LAMP environment with piCore-8.0, all necessary components are available in the repo:
- apache2.4
- mariadb (replacing MySQL)
- apache2.4-mod-php5 or apache2.4-mod-php7
Just tested, Joomla-3.5.1 runs fine with php7 on RPi3. If you try it, please share your findings. Other PHP apps my require different PHP settings or modules which are not built yet.