Something

if (!strcmp(cmd, "/pullincar", true))
{
    tmp = strtok(cmdtext, idx);
    if (!strlen(tmp))
        return SendClientMessage(playerid, COLOR_YELLOW, "USAGE: /pullincar [player id] [seatid]");
    new person = strval(tmp);
    tmp = strtok(cmdtext, idx);
    if (!strlen(tmp))
        return SendClientMessage(playerid, COLOR_YELLOW, "USAGE: /pullincar [player id] [seatid]");
    new seat = strval(tmp);
    new Float:pos[6];
    GetPlayerPos(playerid, pos[0], pos[1], pos[2]);
    GetPlayerPos(playerid, pos[3], pos[4], pos[5]);
    if (floatcmp(floatabs(floatsub(pos[0], pos[3])), 10.0) != -1 &&
    floatcmp(floatabs(floatsub(pos[1], pos[4])), 10.0) != -1 &&
    floatcmp(floatabs(floatsub(pos[2], pos[5])), 10.0) != -1) return false;
    PutPlayerInVehicle(person, GetPlayerVehicleID(playerid), seat);
    return 1;
}