[n0minal]

Server-sided anti-hacks are efficient to some types of hack like money, bullets, airbrake, unfreeze etc... But another ones like maphack, aimbot aren't very acurate when scripted by server-sided, some of then can't even be detected. In my opinnion sa-mp will not have a lot of hackers anymore on all servers when we can send custom files with new functions to detect some shits when player do something, like an file which is automatically (down)loaded when player connect , like MTA does with servers maps, but SA-MP one should send continous data to the server.

Anyways it is impossible to be done actually, you will need more than only sending some informations for client. This beautiful sexy guy which posted above me have one client-sided anti-cheater, you can use this for free i think if you really want to protect your server, but you will have to say for your players to download client plugin...