—the PlayStation 4's architecture is fundamentally different from the PS3's unique Cell processor. However, for enthusiasts with a jailbroken console, there are complex workarounds to make these generations bridge the gap.
On a , you can install an unofficial PS3 emulator like RPCS3 (Linux on PS4) or PS3_Emu (very experimental). convert ps3 games to ps4 pkg
However, if you have a , you can play PS3 games by running a Linux payload and using the RPCS3 emulator . How to Play PS3 Games on a Jailbroken PS4 for enthusiasts with a jailbroken console