PHP Encapsulation

Encapsulation is used to bind the data using get and set method or hide the values to prevent from unauthorized parties’ to directly access them. For encapsulation, we generally use the concept of visibility (public, private, protected).

Public Access

<?php

class Course{

            public $subject;

            public function getSubject()

              {

                        return $this-> subject;

              }

}

$student = new Course();

$student-> subject =”Php MySQL”;

echo $student-> getSubject();

?>

Output

Php MySQL

• When we declare the property or a method as public(encapsulated), it means this can be accessed anywhere outside the class; means can be modified from anywhere in your code.
• If we declare it private(encapsulated); it means this can’t be accessed anywhere in the class; means can be access only within code. If we run it shows the error

Fatal error: Uncaught Error: Cannot access private property Course: $subject

To overcome this, we use set method

<?php

class Course{

            private $subject;

            public function setSubject($s)

              {

                        $this-> subject=$s;

              }

            public function getSubject()

              {

                        return $this-> subject;

              }

}

$student = new Course();

$student-> setSubject(“Php MySQL”);

echo $student-> getSubject();

?>