Forum Moderators: Robert Charlton & goodroi
I have no choice to change the page names because the new site is written in PHP.
I can understand why you're wanting to change though, and the biggest recommendation I would make is don't do it all at once... Change the design. Then change the text. Then change the URLs (shopping cart) or something to that effect in a different order.
All you have to do is parse .asp extensions as .php and you can leave the URLs exactly as they are.
How do I know when it is time to change the articles and URLs?
Keeping the same page URLs for the articles will be easy.
I'm not sure about the product detail pages. I know that I can 301 redirect the old URLs to the new ones, but I don't know about the internal link structure.
Every product url ends in prod_1.html
I might not even worry too much about it if you can leave the bulk of the content on the same URLs. IMO You should just wait until everything else settles down before you move them. If there are very many I think it has been advised to move them in sections if possible.