[Bayler]

as andreskkk stated, your missing brackets, then like 4 people post afterward and make the same mistake

Код:

public OnPlayerStateChange(playerid, newstate, oldstate)
{
  if(newstate == PLAYER_STATE_DRIVER || newstate == PLAYER_STATE_PASSENGER)
  {
    if(IsPlayerInChoppa(playerid))
    {
     //your code here
    }
  }
  return 1;
}

Notice the if(IsPlayerInChoppa(playerid)) ALL opened Brackets are Closed!