abstract class in 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}

1Answer
2  https://stackoverflow.com/questions/41611058/why-does-php-allow-abstract-static-functions/41611876

1abstract class Hello {
2    const CONSTANT_1 = 'abstract'; // Make Abstract
3    const CONSTANT_2 = 'abstract'; // Make Abstract
4    const CONSTANT_3 = 'Hello World'; // Normal Constant
5    function __construct() {
6        Enforcer::__add(__CLASS__, get_called_class());
7    }
8}

1
2    <?php
3abstract class 
4    ParentClass {
5  abstract public function someMethod1();
6  
7    abstract public function someMethod2($name, $color);
8  abstract 
9    public function someMethod3() : string;
10}
11?>
12