Cómo hacer con clases en PHP

<?php
class house {
  public $color;
  public $land;	
  public function __construct($color, $land) {
    $this->color = $color;
    $this->land = $land;
  }
  public function message() {
    return "My house is " . $this->color . " in color and occupies" . $this->model . " of land!";
  }
}

$House = new house("black", "40 meter squares");
echo $House -> message();
echo "<br>";
$House = new house("red", "30 meter square");
echo $House -> message();
?>

//Another example:

class Fruit {
  public $fruitname;
  public $type;
  public function __construct($fruitname, $type) {
    $this->color = $fruitname;
    $this->model = $type;
  }
  public function message() {
    return "The fruit is a " . $this->fruitname . "and in type, " . $this->type;
  }
}

$Fruit = new Car("mango", "Carabao");
echo $Fruit -> message();
echo "<br>";
$Fruit = new Car("apple", "Red Delicious");
echo $Fruit -> message();
?>
Rick Astley