Example #1
0
<?php

abstract class Animal
{
    public $name;
    public $age;
    public function Describe()
    {
        return $this->name . ", " . $this->age . " years old";
    }
    public abstract function Greet();
}
class Dog extends Animal
{
    public function Greet()
    {
        return "Woof!";
    }
    public function Describe()
    {
        return parent::Describe() . ", and I'm a dog!";
    }
}
$animal = new Dog();
$animal->name = "Bob";
$animal->age = 7;
echo $animal->Describe();
echo $animal->Greet();
<?php

class Animal
{
    public $name;
    public function Greet()
    {
        return "Hello, I'm some sort of animal and my name is " . $this->name;
    }
}
class Dog extends Animal
{
}
//$animal = new Animal();
//echo $animal->Greet();
$dog = new Dog();
$dog->name = "Bob";
echo $dog->Greet();