<?php
    class A{
        public $name = "Sudhir Gour";

        public function show(){
            echo "Sudhir";
        }

        public function calc($a , $b){
            return $a * $b;
        }
    }

    class B extends A{
        public $name = "Krishna"; // Property Overriding; Altering the property of parent class

        public function show(){ // Method Overriding ; Altering the method of parent class;
            echo "Ram";
        }

        public function calc($a , $b){
            return $a + $b;
        }
    }

    $objA = new A();
    echo $objA->name;
    echo $objA->calc(10 , 4);

    $objB = new B();
    echo $objB->name;
    echo $objB->calc(10 , 4);
    

?>