Dear AZNDUDE,
the University of Phoenix is a full regionally accredited University in the USA. So this means that they maintain good educational standarts. The answer to your question is that the relevant Visa Office will accept a degree from the U of P. Go to CIC.GC.CA and find the instruction for Visa Officers call "OP6" which is in PDF format. Read it carefully and you'll find information on how they assess distance learning degrees. They are usually afraid of 'unaccredited' degrees. But the U of P is accredited and furthermore, as far as I know, they've even got a campus in Canada. So don't worry, I BELIEVE that they'd accept it.
Good luck
PS: U of P is VERYYY expensive, isn't it? Go and study in Canada for they price.