I have never done site in php only in html. And now i am building a site with friend of mine who knows php and doesn' t know Seo. So what's difference between php and html seo ?
Great. So if i don't use strange php urls without keywords such as domain.com/?p=231 its all the same.
It's the same even with url's like that. The only thing to be careful of is don't uses an excessive amount of variables (5+) and don't use anything that looks like sessions a ID.
there is really no difference in terms of SEO, but i much much more prefer PHP. I cant work with html if its a website with more than 10 pages...
Pages are treated the same. Dont have long complicated URL parameters, dont have more than 5/6 url parameters, dont include session id's in the url and you will be fine.