PHP not working any longer after installing Drupal 6.15

I have had PHP, Apache and MySQL working and the PHP test displayed perfectly.After installing Drupal 6.15 and restarting the computer, PHP does not work any longer .The browser displays nothing.The PHP Apache module is of course loaded and enabled.I have also reinstalled PHP and all the corresponding Module with YAST again. to no avail.Has anyone an idea?:(:frowning:

Isn’t drupal 6 incompatible with php 5.3 which is what 11.2 comes with?