Nope. Joey and Phoebe never dated. Joey once dated Ursula, Phoebe's twin sister, but never Phoebe. They were close though, really close. They even go out for رات کے کھانے, شام کا کھانا once a ماہ to 'discuss' about the other guys (as claimed in Season 7 Episode 11: The One With All the Cheesecake). ;P