He uses php, java and mysql together - and the website IS the wallet.
Its also far from the first currency written in php, see neoscoin for a 2014 php-only coin.
Ive been coding since I was a kid and have read the source code of at least dozens if not hundreds of shitcoins.
I have more trouble decyphering your responses, then the php error. If this isnt a language barrier could you try reading your own responses first because this is painful to read, and after looking at your comment history it doesnt get better..