Slide môn học PHP session 8b OOP concepts

 Functionality of the email process is done with the help of the mail function  Main arguments of the mail function are:  Recipient’s email address  Subject of the email  Body of t

OOP Concepts

Session 21

 Functionality of the email process is done

with the help of the mail() function

 Main arguments of the mail() function are:

 Recipient’s email address

 Subject of the email

 Body of the email

 Local mail server for mail() function is

specified in the php.ini configuration file

 Type of messages are specified with the

help of the content-type header while

attaching a file to the email

Review

Object Oriented Basics

 Programming with a data type of a data

structure that is defined with the type of

functions and are performed on the data

structure

 Uses for combining the data and the functions

into a single unit or an object

 Concept of an object-oriented programming are:

Inheritance - I

 Creates a new class with the help

of a base class

functions, and methods of the base class are transferred to the newly derived class

inheriting a new class from the base class

 Derived class also has its own

Note: In PHP, multiple inheritances

are not supported

 Object that contains variables and

functions of different data types is a class

 Class can be inherited from a base class

to create a new derived class

 Derived class uses all the properties of the base class including its own

properties

 Class variables are local to its class

 class – Uses for declaring a class name

 class_name – Specifies the class name

 class_variable – Specifies the variable name for

the class

 function – Uses for defining a function

 function_name() – Specifies the function name

Class - Example- I

 For example, to enter the

employee details using classes

Saving the Class file

includes it in the php file

 Includes the empdet.inc file in

the php file in the following

format:

include “empdet.inc”;

Inheriting a Class

 A new class can be inherited from an old class

the parent class along with its own properties

Syntax for Inheriting a Class

 Syntax for inheriting a new class

that of its class name is a

constructor

 Uses new operator for calling

constructor in the main program That

is creating a request for the class

the class when a constructor is

declared

 class – Uses for declaring a class name

 class_name – Specifies the class name

 class_variable – Specifies the variable name for the class

 function – Uses for defining a function

Constructor - Example - I

 For example, to call a constructor from a

derived class from a base class

Create and Use Objects

 Self-contained entity those consists of both

data and procedures to manipulate the data It

 new – Initializes the object

 class_name – Specifies the class name

Creating an Object - Example

 For example, create an object for the class

usermail

<?php

class usermail

{

var $username = “john”;

var $password = “abc123”;

}

class userdetails extends usermail

{

var $secretquery = “favourite food”;

var $answer = “chinese”;

}

$mail = new userdetails;

echo $mail;

?>

data Objects can be manipulated as needed

abstraction, encapsulation, polymorphism, and inheritance

to a derived class It has its own properties

termed as inheritance It is done with the help of the

extends keyword

is a constructor It is called by using a new operator