[GTA_Rules]

Yes, for example:

pawn Код:

public OnPlayerDisconnect(playerid, reason)
{
  new a = playerid; // you here declare the variable 'a' to be playerid.
  if(a == 5)
  {
   print("the player who disconnected had the id 5");
  }
  else 
  {
   print("the player who disconnected didn't have the id 5");
  }
  return 1;
}