Depends. University of Phoenix awards doctorates that take 3-4 years (HUGE red flag -- the best and brightest phd students
might get out in 4 years if everything goes perfectly; an "expected time to graduation" of anything less than 5 years is almost certainly a worthless degree).
Those doctorates don't require much more than taking some coursework and paying a boatload in tuition. Basically an expensive and length online masters program. Not worth the paper they're printed on, unless you're employed by the government or in a union job that mandates raises for education attainment.
As a general rule of thumb, PhDs from R01 universities that are paid for by the university through research assistantships or teaching assistantships are generally a good signal of at least minimal training in research skills.
Another good general rule of thumb is that paying for a PhD -- beyond perhaps some MD/PhDs or maybe nursing phds, stuff like that -- is always a good sign of someone who has both a meaningless degree and also poor reasoning/research skills.
But anyways, real doctorates outside of a few fields (e.g., pure math) usually come with a non-trivial publication record that speaks for itself. You don't even need to know that the person has a doctorate; you can just read their papers and a rec letter from an advisor describing the student's role in each paper.
(I'm excluding discussion of professional degrees like JDs, PharmDs, etc. which are technically doctorates but sort of their own class.)