Intro to OOP PHP and Github

What does PHP stand for?
 Personal Homepage

 PHP: Hypertext Preprocessor (recursive acronym)
 Created by Rasmus Lerdorf (1994)

It’s FREE!!

 PHP is open-source

Platform Independent
 Can be deployed/installed in different OS

Great Documentation

 php.net
 Functions are well explained + informative

examples

Large and Active Community

 stackoverflow
 php.net
 github
 Etc...

Easy to learn

 Simple syntax
 Well documented
 Lots of tutorials everywhere
 Lots of premade libraries

WHY PHP
 It’s Free
 Platform Independent

 Great Documentation
 Large and Active Community
 Easy to learn

Object Oriented Programming
 A programming concept that treats functions and

data as objects.
 A programming methodology based on objects,
instead of functions and procedures.

“I explain that procedural program is built around
the "verbs" of the system, the things you want the
system to do, whereas object-oriented
programming is build about the "nouns," the
things in the system, and what they are capable
of.”

CLASS
 is a "template"/"blueprint" that is used to

create objects
 usually represents a noun, such as person, place or
thing.

OBJECT
 In real world object is a material thing that can be

seen and touched.
 In OOP, object is a self-contained entity that
consist of both data and procedures.
 An instance of a class

Give examples of real life class and object.

INSTANCE
 layman's term - a case or occurrence of anything
 a single copy of an object, there might be one or

several objects, but an instance is a specific copy,
to which you can have a reference

INHERITANCE
 biology - the genetic characters transmitted from

parents to offspring
 OOP - provides reusability of codes. We can add
additional codes to an existing class without
modifying it.
 can be defined as the process of one object
acquires the properties of another by making
subclasses (parent-child relationship)

INHERITANCE
<?php
class BasketballPosition
{
// some methods and properties
}
class PointGuard extends BasketballPosition
{
// some methods and properties
}

Class Properties and Methods
 Height
 Weight
 Pass
 Dribble
 Shoot
 Rebound
 Block

Class Properties
 also know as data members and is used to hold

data of a class.
 The data that it holds are specific to the nature of
the class in which it has been defined.

Class Properties
class PointGuard
{
public $name;
public $ball_handling_level;
}

Class Methods
 functions that are associated with the class
 functions that can be involve in the class property

processing

Class Methods
class PointGuard
{
public $name;
public $ball_handling_level;

public function createPlay()
{
// some processing here
}
}

Encapsulation
 facilitates the bundling of data with

the methods (or other functions) operating on that
data.
 restricting access to some of the object’s
components.
 used to hide the values or state of a structured data
object inside a class, preventing unauthorized
parties' direct access to them.

Encapsulation
Example :
Courting a girl

Encapsulation
 Access modifiers/Visibility

private
 property and method can be accessed only inside the
class itself and can't be accessed anywhere else
 protected
 property and method can be accessed only inside the
class itself and inside child classes.
 public
 allows the property/method to be accessed from
anywhere of code


Private
class Love
{
private $hearbeat_per_second = 100;
public function getHeartBeatPerSec()
{
return $this->heartbeat_per_second;
}
}
class Valentines extends Love
{
public function getHeartBeatPerSecWhenNear()
{
return $this->heartbeat_per_second * 2; // will produce an error
}
}
$love = new Love();
echo $love->getHeartBeatPerSec(); // will output 100
echo $love->heartbeat_per_second; // will produce an error

Protected
class Love
{
protected $hearbeat_per_second = 100;
{
}
}
{
{
return $this->heartbeat_per_second * 2; // will return 200
}
}
$love = new Love();
echo $love->heartbeat_per_second; // will produce an error

Public
class Love
{
public $hearbeat_per_second = 100;
{
}
}
{
{
return $this->heartbeat_per_second * 2; // will return 200
}
}
$love = new Love();
echo $love->heartbeat_per_second; // will output 100

Choosing the Right Visibility
START

Accessed
externally?

Y

public

N
Deny to
children?
N
protected

Y

private

PHP OOP
 Object and Class
 Instance

 Inheritance
 Class Properties and Methods
 Encapsulation

Introduction to Git and Github

Git whhaaat???
 Is a source/version control management software.
 Is a software that allows you to track the changes

that you make to individual files.

Github eeeeee??
 is a web-based hosting service for software

development projects that use the Git revision
control system
 “social coding”

Why u no use git and github??
 Git can track your changes to your projects.

 You can go back to a certain change you made that

you want to recover.

Why u no use git and github??
 Github lets you collaborate with other developers

or your project teammates by adding comments or
suggestions on commits.
 You can also contribute to public/open source
projects. (eg. Facebook SDK, Codeigniter, PHP,
etc...)
 Share your codes to public and get feedback from
large community of developers.

Commands Overview
 git init

Initializes a git repository.
git status
 Check your changes made (untracked files, modified files, staged files)
git commit
 Save your changes into one commit history.
git push
 Push your changes in the remote repository.
git pull
 Pull changes from remote repository and apply it to your local repository.
git fetch
 Fetch changes from remote repository but changes will not apply to your
local repository








Git and Github
 Git and github can be effectively used in project

collaborations.
 Can improve a developer’s coding.
 Can avoid overriding or duplicating codes
 Not just a developer tool

“Whenever you are asked if you can do a job,
tell'em, Certainly, I can! Then get busy and find
out how to do it.”
- Theodore Roosevelt

Intro to OOP PHP and Github

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