[LarzI]

I believe the callback you are thinking of Don Correlli, is in YUP.
Anyways, if you don't want to use more callbacks, just use OnPlayerUpdate

pawn Код:

//global
new 
  Float:g_fUpdateHealth;
//OnPlayerUpdate
public OnPlayerUpdate(playerid)
{
  new
    Float:fUpdateHealth;
  if( fUpdateHealth != g_fUpdateHealth );
  {
    //health has changed
  }
  return true;
}