Oop in-php

NuevoThoughts Technologies
OOPs in PHP
By Shubhendu
Date:16-Mar-2013 V1
www.NuevoThoughts.com

Summary of what we discussed:
 What is OOP?
Why we use OOPs in PHP?
How do we use OOPs in PHP?
Where do we use OOPs in PHP?
Summary

What is OOP?:
 Object Oriented Programming-
Basically means Programming driven by Object
Object Oriented
Programming
Procedural Programming
Programming Languages
Code controlling data
(Code is important)
Data is to Access code
(Data is important)

Object Oriented Programming:
Class: Programmer defined datatype include function & variables.
Object: Individual instances , used to access variable & method.
Functions: Set of code (specific tasks).
Variables: Data
Inheritance
Class in class(parent & child class)
Polymorphism
Overloading
Abstraction
Encapsulation
Constructor
Destructor

Why do we use OOP in PHP:
We can use PHP both as procedural and Object oriented language.
Now, question is why we use OOP concept in PHP?:
Reasons:
Flexibility
Reduce source code by more than 99.9%.
Much easier in implementing security.
Makes coding more organized.
 Help to work in team easily.

Flexibility:
Easily extend our PHP code whenever we require.
Member variables & functions are easily accessible from any where in the code.
Example:
in abc.php:
class sample
{
public $var;
function sample-f()
{
some code………
}
}
in abc1.php:
<?php include abc.php
$obj=new sample();
$obj->var=738
$obj->sample-f();?>

Reduce Source Code by more than 99.9%:
When we create big project which require lots of files, it reduces our lots of work.
In procedural PHP when we require same variable in more than one file, we copy
paste that variable or function .
But in case of OOP PHP we just put code in class , by object we can call them.
Example: in abc.php
class s1
{
public $var;
function f1()
{
//code}
}
*in abc1.php *in abc2.php
<?php include ‘abc.php’; <?php include ‘abc.php’;
$obj=new s1();
$obj->var=“hello”;?> $obj=new s1();
$obj->var=“hi”; ?>

Much easier in implementing security:
Security is most vital requirement in web development.
OOPs provide security by using object, all data transferred in terms of objects.
Example:
In abc.php in abc1.php
Class a <?php
{$var; include ‘abc.php’;
public Function f1($val) $obj=new a();
{If($val==NULL) $obj->f1(“sss”);
{ echo $obj->val;
This->val=“hello1”; //$obj->f2(“123”);
}} //echo $obj->val;
Public Function f2($val) ?>
{if($val==123)
This->val=“hello2”;
}}

Makes coding much easier:
OOP makes coding much easier to understand and clean.
Help to work in team easily:
Its important to have same method, implementations, algorithm in team
For a project.

How do we use OOP in PHP?:
Step 1: Create two or more PHP files:(assuming two)
Index.php
Class.php
Step 2: Put all OOP code in class.php;
Class a()
{
$var;
Function f($val)
{
this->var=$val;
}
}
Step 3:create object and access OOP functions/variables from another file.
<?php
Include class.php;
$obj=new a();
$obj->var=“hi”;
$obj->f(“hello”);
?>

The Principle of Model view Controller:
INPUT->PROCESS->OUTPUT
CONTROLER->MODEL->VIEW
view
model
controller
User
uses
manipulatesupdates
sees
application

Model:
A model is an object representing data or even activity.
The model manages the behavior and data of the application domain.
The model is the piece that represents the state.
View:
A view is some form of visualisation of the state of the model.
The view is responsible for mapping graphics onto a device.
Controllers:
A controller offers facilities to change the state of the model.
A controller is the means by which the user interacts with the application.

Where do we use OOPs in PHP:
Often use for creating CMS(Content management system).
Secure application.
For big projects.

Summary:
PHP can be used both as procedural and Object-oriented.
OOP provides flexibility, security, easiness etc to programmer.
MVC is totally based on OOPs concept.
CMS Is designed on MVC model

Thanks

Oop in-php

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