'Do PS4 controllers work on PS3?': How to connect your PS4 controller to a PS3 in 2 ways

PS4 controllers will work with a PS3 console, and when you use a wired connection, there is no setup involved. Here's what ...

Can you use a PS4 controller on a PS5? Yes, here's how

To use your PS4 controller on a PS5, connect it to the PS5 with a USB cable and press the PlayStation button on the controller.
IGN

Sony Confirms You Can't Play PS5 Games with a PS4 Controller

Sony has revealed more details on how PlayStation 4 peripherals and accessories will work with PlayStation 5, including that the DualShock 4 will not work with PS5 games. Revealed on PlayStation.Blog, ...