Single Inheritance: PHP OOP

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Inheritance is a way to reuse the code of existing objects.
In this video tutorial we’re illustrating single inheritance mechanism.

php-oop-single-inheritance

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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< ?php
		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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< ?php
		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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< ?php
		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


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YouTube Link: http://www.youtube.com/watch?v=pdDqtHlkzEY [Watch the Video In Full Screen.]



Uses of Inheritance:
Re-use of code.
Less and cleaner looking code.
Ease of understanding of code.
Ease of maintenance of project.

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