PHP program to demonstrate the multi-level inheritance

<?php
//PHP program to demonstrate the multi-level inheritance.
class Base
{
    function BaseFun()
    {
        echo "BaseFun() called<br>";
    }
}

class Derived1 extends Base
{
    function Derived1Fun()
    {
        echo "Derived1Fun() called<br>";
    }
}

class Derived2 extends Derived1
{
    function Derived2Fun()
    {
        echo "Derived2Fun() called<br>";
    }
}

$dObj = new Derived2();

$dObj->BaseFun();
$dObj->Derived1Fun();
$dObj->Derived2Fun();

?>

Output
BaseFun() called
Derived1Fun() called
Derived2Fun() called