abstract function php

1<?php
2/**
3 * abstract means incomplete
4 * abstract class contains atleast 1 abstract function
5 * abstract function:- we must declare it but not implement it, it can not contain body
6 * you can't create object of abstract method
7 * abstract class, child class must contain abstract function
8 */
9abstract class Bank
10{
11    abstract function id_proof();
12}
13class Hdfc extends Bank
14{
15    function id_proof()
16    {
17        echo "hdfc bank";
18    }
19}
20class Axis extends Bank
21{
22    function id_proof()
23    {
24        echo "<br>axis bank<br>";
25    }
26}
27
28$obj = new Axis();
29$obj -> id_proof();
30
31$obj1 = new Hdfc();
32$obj1 -> id_proof();
33?>

1abstract class absclass { // mark the entire class abstract
2    abstract public function fuc();
3}