[dice7]

I would still use native functions rather then my own variables to find the players skin, since they are the most accurate.
But your example would work

pawn Код:

public OnPlayerSpawn(playerid)
{
  if(GetPlayerSkin(playerid) == 0)
  {
    SetPlayerSkin(playerid, 135);
    PlayerInfo[playerid][pChar] = 135;
    SendClientMessage(playerid, COLOR, "You can't use CJs skin. Changing to another one. Press F4 if you want to select a new skin");
  }
}