Object Oriented Programming with Laravel - Session 1

Object-Oriented
Programming 
(with Laravel)
By: Shahrzad Peyman
Session 1
March-2017
shahrzad.peymaan@gmail.com
1

Today’s Presentation
▪ What is PHP?
▪ Object Oriented Programming
▪ Introduction to PHP Syntax
▪ Composer
▪ Framework
▪ MVC
▪ Laravel
2

What is PHP?
▪ PHP is a popular, general-purpose and server-side scripting
language that is especially suited to web development.
▪ Commonly used to build web applications.
▪ PHP: Personal Home Page --- Php Hypertext Preprocessor
▪ PHP (Hypertext Preprocessor) was created by Rasmus Lerdorf in
1994. It is now developed and improved by a large team of
people.
▪ http://www.php.net
3

PHP History
PHP2 1995 Added database support, file uploads,
variables, arrays, recursive functions,
conditionals, iterations, regular expression and
etc.
PHP3 1998 Added support of ODBC data sources, multiple
platform support, email protocol, and new parser
written by Zeev Suraski and Andi Gutmans.
PHP4 2000 The parser was renamed the Zend Engine. Many
security features were added.
PHP5 2004 Adds Zend Engine 2 with object oriented
programming, robust XML support, SOAP
extension for interoperability with Web Services,
SQLLite has been bundled with PHP.
PHP7 2015 Revolution in PHP
4

Scripting Language
▪ A scripting language is a programming language that employs a
high-level construct to interpret and execute one command at a
time.
▪ Interpreted at runtime
5

Who Uses PHP?
▪ Yahoo!
▪ Facebook (HACK)
▪ Wikipedia
▪ 20+ million other domain names
6

Which Tools Based on PHP?
▪ Wordpress (Blog engine)
▪ Drupal (CMS)
▪ Slack (Chat Service)
▪ Joomla (CMS)
➢As of January 2013, PHP was used in more than 240
million websites (39% of those sampled) and was installed on
2.1 million web servers.
7

Why I Choose PHP?
▪ Cost nothing, it is free to download and use.
▪ Open source
▪ Runs on different platforms
▪ Codes and solutions are easily available
▪ Lots and lots of knowledge and documentation
▪ Speed of development
8

Object-Oriented Programming
What is Object-Oriented Programming (OOP)?
Object-oriented programming (OOP) is a programming paradigm
based on the concept of "objects".
So,
Objects are key to understanding object-oriented technology.
10

What is Object?
❖Many examples of real-world objects
▪ your Book, your PC, your Mobile, your Computer mouse and so on.
❖Real-world objects share two characteristics:
▪ State
▪ Behavior
❖Software Objects
▪ Modeled after real-world objects.
▪ Maintains its states in variables or attributes.
▪ Implements its behaviors with methods.
11

Objects
▪ E.g. A Computer Mouse is a real-world Object. Its states would be
its color, size and brand name and its behaviors would be left-
click, right-click and middle click.
▪ Software object that modeled your real-world computer mouse.
▪ Have variables(attributes) that indicated the computer mouse’s current
states:
▪ Its color is black.
▪ Its size is medium.
▪ Its brand name is Genius.
▪ Have methods that indicated the computer mouse’s current behaviors
like left-click, right-click and middle click.
12

What is Class?
▪ A class is a prototype that defines the variables and the methods
common to all objects of a certain kind.
▪ A class is an entity that helps the programmer to define a new
complex data type.
➢An object is an instance of a class.
➢A class defines the data and behavior of objects.
➢E.g. Apple, Orange and banana are members of the fruit class.
13

Introduction to PHP Syntax
▪ PHP has quality easy syntax. If you are familiar with any c-type
language
▪ It has all the same structures that you are familiar with other
programming languages
▪ PHP is designed to output to browser, but it is possible to do also
CLI apps
14

Variables
▪ Variables in PHP are represented by a dollar sign ($).
▪ PHP supports nine main types:
▪ boolean
▪ integer
▪ float
▪ double
▪ string
▪ array
▪ object
▪ resource
▪ NULL
▪ Case-sensitivity
▪ Start with letter or _
▪ After that you can have numbers, letters and _
15

Booleans
▪ Simple Type
▪ A boolean expresses a truth value. It can be either TRUE or False
(case-insensitive).
16

Integers
▪ An integer is a number of the Set Z = { … , -2 , -1 , 0 , 1 , 2 , … }
▪ Integers can be specified in decimal (base 10), hexadecimal
(base 16), octal (base 8) or binary (base 2) notation, optionally
preceded by a sign ( - or + ).
17

Array
▪ An array in PHP is actually an ordered map. A map is a type that
associates values to keys.
▪ This type is optimized for several different uses:
▪ Array
▪ List (vector)
▪ Hash table
▪ Dictionary
▪ Collection
▪ Stack
▪ Queue
▪ …
18

NULL
▪ The special Null value represents a variable with no value.
▪ NULL is the only possible value of type null.
▪ A variable is considered to be null if:
▪ It has been assigned the constant NULL.
▪ It has not been set to any value yet.
▪ It has been unset()
19

Functions
▪ A function may be defined using syntax such as the following:
▪ Any valid PHP code may appear inside a function, even other
functions.
20

Class in PHP
▪ Basic class definitions begin with the keyword class, followed by
a class name
▪ Then, followed by a pair of curly braces which enclose the
definitions of the properties and methods belonging to the class.
21

Object in PHP
▪ Instance of class
22

Namespace
▪ Provide a way in which to group related classes, functions,
constants and others.
▪ An abstract concept in many places.
▪ In PHP world, namespaces are designed to solve two problems:
▪ Name collisions between code you create
▪ Improving readability of source code (Ability to alias)
23

Composer
▪ Composer is a tool for dependency management in PHP. It allows
you to declare the libraries your project depends on and it will
manage (install/update) them for you.
▪ Use:
▪ Install Composer
▪ In root of your project, Create a text file (JSON File) – composer.json
▪ Require all libraries you want to use it
▪ Composer install
24

What is Framework?
▪ An application framework is a software library that provides a
fundamental structure to support the development
of applications for a specific environment.
▪ In computer systems, a framework is often a layered structure
indicating what kind of programs can or should be built and how
they would interrelate.
▪ A PHP Framework is a basic platform that allows us to develop
web applications. In other words, it provides structure. By using
a PHP Framework, you will end up saving loads of time, stopping
the need to produce repetitive code, and you'll be able to build
applications rapidly (RAD).
25

MVC: Model-View-Controller
▪ Model–View–Controller (MVC) is a software design pattern for
implementing user interfaces on computers.
▪ It divides a given application into three interconnected parts in
order to separate internal representations of information from the
ways that information is presented to and accepted from the user.
▪ Popular programming languages like Java, C#, Ruby, PHP and
others have popular MVC frameworks.
26

Laravel
▪ Laravel is a free, open-source PHP web framework created by
Taylor Otwell.
▪ Intended for the development of web applications following
the model–view–controller (MVC) architectural pattern.
➢As of March 2015, Laravel is regarded as one of the most
popular PHP frameworks, together
with Symfony2, Nette, CodeIgniter, Yii2 and other frameworks.
27

Laravel Requirements:
▪ The Laravel framework has a few system requirements:
▪ PHP >= 5.6.4
▪ OpenSSL PHP Extension
▪ PDO PHP Extension
▪ Mbstring PHP Extension
▪ Tokenizer PHP Extension
▪ XML PHP Extension
Laravel utilizes Composer to manage its dependencies. So, before
using Laravel, make sure you have Composer installed on your
machine.
28

Install Laravel
▪ First, download the Laravel installer using Composer:
▪ composer global require "laravel/installer“
▪ laravel new blog
29

Object Oriented Programming with Laravel - Session 1

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