[Dayrion]

Useful to note you can assign multiple id to one handler.
Simple exemple: OnActorStateChange is called when a actor is streamed in or out for a player.

PHP Code:

PR_RegHandler(0xAB, "OnActorStateChange", PR_OUTCOMING_RPC); 
PR_RegHandler(0xAC, "OnActorStateChange", PR_OUTCOMING_RPC);