[BroZeus]

You need to loop through those array and check if ID exists in them.

PHP код:

//the function to check if its cop car or not
stock IsCopCar(vid)
{
         new i;
         for(i = 0; i < sizeof(lspdinf); i++)if(vid == lspdinf[i])return true;
         for(i = 0; i < sizeof(lspdche); i++)if(vid == lspdche[i])return true;
         for(i = 0; i < sizeof(lspdbul); i++)if(vid == lspdbul[i])return true;
         return false;
}
//function usage: 
public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
        if(IsCopCar(vehicleid))
        { dont let him in unless cop...}
}