[Hiddos]

pawn Код:

stock GiveServerMoney(playerid, amount)
{
  SetPVarInt(playerid, "Money", GetPVarInt(playerid, "Money") + amount);
  SetPlayerMoney(playerid, GetPlayerMoney(playerid) + amount);
}

stock SetServerMoney(playerid, amount)
{
  SetPVarInt(playerid, "Money",  amount);
  SetPlayerMoney(playerid, amount);
}

stock ResetServerMoney(playerid)
{
  ResetPlayerMoney(playerid);
  SetPVarInt(playerid, "Money", 0);
}

stock GetServerMoney(playerid)
{
  return GetPVarInt(playerid, "Money"); // To compare with client side money
}

Edit to dudit: Setting a variable won't increase his money, neither is it efficient to use OnPlayerUpdate for checking money.