Connect your PS3 controller to your console with a USB cable and press the PS button to sync. If your PS3 controller won't sync, try resetting it with a paperclip inserted into the reset button hole.
Those of you who still love playing on your PS3 – and why not? It’s a great console and there’s no way to play its games on modern systems – may want to try out the DualSense instead of the DualShock ...