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| PHP| encapsulation with example in 2021 |
PHP| encapsulation with example
Encapsulation: The process of combining many elements into a single entity is called Encapsulation. In the field of the programming language, the process of combining data member and member function into a single entity-like class is called Data encapsulation.
It is an important feature of object-oriented programming. It is used to prevent the direct accessibility of data member and member function and this is done by using access specifier, public, private, protected, etc
Access Specifier: It is a keyword that
is used to provide accessibility of data member(variable) and member
function(function) of a class. It is
also called an access modifier.
Types of Access Specifiers: There are
five types of access specifiers.
1. Public
2. Private
3. Protected
Public: It allows the accessibility of
data member and member function to the other classes. The public element of a class can be accessed anywhere in the program.
Private: It is used to hide data member
and member functions from the other classes. The private element of a class can be accessed only inside its own class. 3. the private
element of a class cannot be accessed out of that class.
Protected: It is the same as
private but it allows the accessibility of data member and member function to
the child class. protected is used
in the case of inheritance.
How to use Encapsulation in PHP?
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<?php class Intro { public $name; private $id; protected $marks; function set_data($n,$i,$m) { $this->name = $n; $this->id = $i; $this->marks = $m; } function get_data() { echo "Student Name:".$this->name."<br>"; echo "Student Id:".$this->id."<br>"; echo "Student Marks:".$this->marks."<br>"; } } $s = new Intro(); $s->set_data("Icoderweb",17635,96.5); $s->get_data(); echo $s->name; echo $s->id; echo $s->marks; ?> *****OUTPUT***** Student Name:Icoderweb Student Id:17635 Student Marks:96.5 Icoderweb ( ! ) Fatal error: Cannot access private property Intro::$rollno in C:\xampp\www\\program.php |
How to use Encapsulation with output in PHP?
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<?php class Intro { public $name; private $id; protected $marks; function set_data($n,$r,$m) { $this->name = $n; $this->id = $i; $this->marks = $m; } function get_data() { echo "Student Name:".$this->name."<br>"; echo "Student Id:".$this->id."<br>"; echo "Student Marks:".$this->marks."<br>"; } } $s = new Intro(); $s->set_data("Icoderweb",2021,96.5); $s->get_data(); ?> *****OUTPUT***** Student Name:Icoderweb Student Id:17635 Student Marks:96.5 |
