23-template.php

<?php

// === A Template for all Car ===
abstract class Car
{
    public $color = "White";
    public $doors = 4;

    public function __construct($name)
    {
        $this->name = $name;
    }

    public function loadPassenger()
    {
        echo "The $this->name is loading passengers...\n";
    }
}

class Minivan extends Car
{
    public $doors = 5;

    public function loadGrocery()
    {
        echo "The $this->name is loading grocery...\n";
    }
}

class SportCar extends Car
{
    public $doors = 2;
    public $color = "Red";

    public function loadPassenger()
    {
        echo "The $this->name is loading a buddy...\n";
    }
}

// ---

$fit = new Minivan("Fit");
$fit->loadPassenger();
// Output: The Fit is loading passengers...

$evo = new SportCar("Evo");
$evo->loadPassenger();
// Output: The Evo is loading a buddy...