Thanks Milmor. I tried to change p/w on php through ftp. Didn’t ork. I then re-searched my mails for original p/w sent by wp. Found it, used it, worked. However, I still don’t know what I’ve done exactly and how to undo it. I’m going to look at Users on the Dashboard. Cheers.
After checking and rechecking index and other php files with no result, I reset Safari. It worked. Sorry, but hopefully this might help anyone else with the same problem.