if(GetVehicleModel(GetPlayerVehicleID(playerid)) == 538)
	{
		for(new i=0; i<MAX_PLAYERS; i++)
		{
	    	new pveh = GetPlayerVehicleID(playerid);
  			new PName[24];
			GetPlayerName(i, PName, 24);
			if(AccountGetInt(PName[i], "Job") == 2)
    	    {
    	        if(GetPlayerVehicleID(i) == pveh)
				{
					if(i == PLAYER_STATE_DRIVER)
					{
					    GiveMoney(playerid, -AccountGetInt(PName[i], "DriverFee"));
					    GiveMoney(i, AccountGetInt(PName[i], "DriverFee"));
					    new string[60];
					    format(string, sizeof(string), "You have paid Taxi Driver %s $%d", PName[i], AccountGetInt(PName[i], "DriverFee"));
						SendClientMessage(playerid, COLOR_YELLOW, string);
					    format(string, sizeof(string), "You were paid $%d by your passenger.", AccountGetInt(PName[i], "DriverFee"));
						SendClientMessage(playerid, COLOR_YELLOW, string);
					}
				 }
    	    }
   		}

	}

new TaxiPassenger[MAX_PLAYERS];//at the top of your gamemode
new TaxiDriver;//we will use this variable to store the taxi driver's ID

//Good,we will use that variable to confirm the player was passenger in a taxi,so when he connects,set the variable to 0 :P.Good now the actual code:

public OnPlayerStateChange(playerid,newstate,oldstate)
{
   if(newstate==PLAYER_STATE_PASSENGER)
   {
        if(GetVehicleModel(GetPlayerVehicleID(playerid))==538)
        {
             vehicleid=GetPlayerVehicleID(playerid);//we also need the vehicleid,beside the model,you'll see why
             for(new i=0;i<MAX_PLAYERS;i++)
             {
                 if(GetPlayerVehicleID(i)==vehicleid)//we check if any of the players is in the same vehicle as you
                 {
                      if(GetPlayerState(i)==PLAYER_STATE_DRIVER))//then we check if he's a driving the car :P
                      {
                           TaxiPassenger[playerid]=1;//you are passenger in a taxi
                           TaxiDriver=i;//we stored the driver's ID
                           break;//we exited the loop,as every condition matches
                       }
                  }
              }
          }
        }
   //GOOD,now,when you exit the car,if your variable TaxiPassenger equals 1,it means you were passenger in a taxi
      if(newstate==PLAYER_STATE_ONFOOT&&oldstate==PLAYER_STATE_PASSENGER&&TaxiPassenger[playerid]==1)
      {
           //changed i to TaxiDriver,but the money system code is the same
           GiveMoney(playerid, -AccountGetInt(PName[TaxiDriver], "DriverFee"));
       GiveMoney(TaxiDriver, AccountGetInt(PName[TaxiDriver], "DriverFee"));
       new string[60];
       format(string, sizeof(string), "You have paid Taxi Driver %s $%d", PName[TaxiDriver], AccountGetInt(PName[TaxiDriver], "DriverFee"));
       SendClientMessage(playerid, COLOR_YELLOW, string);
       format(string, sizeof(string), "You were paid $%d by your passenger.", AccountGetInt(PName[TaxiDriver], "DriverFee"));
       SendClientMessage(playerid, COLOR_YELLOW, string);
           TaxiDriver[playerid]=0;//he is not anymore passenger in a taxi
     }
   return 1;
}