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PHP program to inherit an abstract class into multiple non-abstract classes

Here, we are going to learn how to inherit an abstract class into multiple non-abstract classes in PHP?
Submitted by Nidhi, on November 21, 2020 [Last updated : March 13, 2023]

Inheriting an Abstract Class into Multiple Non-Abstract Classes

Here, we will create an abstract class that contains the abstract functions and then we will inherit the abstract class into multiple non-abstract classes and define the abstract function in all non-abstract classes.

Program

The source code to inherit an abstract class into multiple non-abstract classes is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

<?php
//PHP program to inherit an abstract class into 
//multiple non-abstract classes.
abstract class AbsClass
{
    public abstract function fun();
}

class Sample1 extends AbsClass
{
    public function fun()
    {
        printf("Sample1::fun() called<br>");
    }
}

class Sample2 extends AbsClass
{
    public function fun()
    {
        printf("Sample2::fun() called<br>");
    }
}

class Sample3 extends AbsClass
{
    public function fun()
    {
        printf("Sample3::fun() called<br>");
    }
}

$obj1 = new Sample1();
$obj2 = new Sample2();
$obj3 = new Sample3();

$obj1->fun();
$obj2->fun();
$obj3->fun();
?>

Output

Sample1::fun() called
Sample2::fun() called
Sample3::fun() called

Explanation

In the above program, we created an abstract class AbsClass that contains abstract functions fun().

After that, we created three non-abstract classes Sample1, Sample2, and Sample3. Here, we used the extends keyword to inherit an abstract class in the non-abstract class.  Then we inherited the same abstract class into all non-abstract classes.

At last, we created three objects $obj1, $obj2, and $obj3, and called functions that will print the appropriate message on the webpage.

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