<?
class Car
{ public $color = "white";
  public $speed;
  public $brand; 
  public function TripTime ($distance)
  {$time = $distance / $this->speed;
   return $time;//Повертає результат роботи
  }
}

$Car1 = new Car;
$Car1->speed = 150;
$Car1->brand = "Audi";
echo "Car1 = ".round($Car1->TripTime(1000),2)." ";

$Car2 = new Car;
$Car2->speed = 220;
$Car2->brand = "BMW";
$Car2->color ="red";
echo "Car2 = ".round($Car2->TripTime(1000),2)." ";

print_r($Car1);
echo " ";
print_r($Car2);
?>