It depends on the job position and on the program. They're good for things like retail management or IT tech, but you won't get to be a doctor or a lawyer with these degrees. If your career requires any sort of licensing, you have to be careful because not all of these online programs account for that. For example you might get into a nursing program but only end up an LPN rather than an RN or higher.
You need to find out if the program being offered is accredited. For example the CCNE is responsible for Nursing accreditation so for this field this would be the source to find out accreditation information.
Depends on what sort of job you're vying for. If the job that you want has a strong connection with academics, fat chance. Want to work for big law or big finance? You won't even get looked at. In the world of IT however, only experience counts.
But many employees overall look down upon online degrees like those from Phoenix. It shoes lack of effort and understanding. Better off attending a CC.