I'm undecided as to focus my energy on learning ASP or PHP which I will want to start doing sometime soon hopefully.

I need to choose, so I'm curious as to whether or not one or the other is more likely to produce XHTML valid code than the other. e.g. a page that will make it through the validator. http://validator.w3.org/

Or, will they both preform the same.

Does anyone know?