Inheritance is a way to reuse the code of existing objects.
In this video tutorial we’re illustrating single inheritance mechanism.
In this tutorial, we take a class called Vehicle with 3 attributes – color, accelerate and decelerate. And 3 methods – design, acceleration, deceleration.
Vehicle Class
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class Vehicle
{
public $color;
public $accelerate;
public $decelerate;
function design($assign)
{
$this->color = $assign;
}
function acceleration($positive)
{
$this->accelerate = $positive;
}
function deceleration($negetive)
{
$this->decelerate = $negetive;
}
}
?> |
Using the methods – design, acceleration and deceleration we assign values to the public attributes color, accelerate and decelerate.
Inherit Vehicle Class To Class Car
inheritance.php
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class Vehicle
{
public $color;
public $accelerate;
public $decelerate;
function design($assign)
{
$this->color = $assign;
}
function acceleration($positive)
{
$this->accelerate = $positive;
}
function deceleration($negetive)
{
$this->decelerate = $negetive;
}
}
class Car extends Vehicle
{
}
?> |
Now create objects benze and bmw of class Car.
Objects of Class Car
vehicles.php
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include_once("inheritance.php");
$benze = new Car();
$benze->design("Red");
echo $benze->color;
$bmw = new Car();
$bmw->design("Silver");
echo "<br />".$bmw->color;
$benze->acceleration(20);
echo "<br />".$benze->accelerate;
$benze->deceleration(5);
echo "<br />".$benze->decelerate;
?> |
Here, using the methods – design, acceleration and deceleration we assign attribute values to individual cars.
Single Inheritance: PHP OOP
[youtube https://www.youtube.com/watch?v=pdDqtHlkzEY]
Uses of Inheritance:
Re-use of code.
Less and cleaner looking code.
Ease of understanding of code.
Ease of maintenance of project.