Unset Method

 <?php

//When we try to unset any class's private property from outside the class at that time

//__unset() method will automatically Call.

class Student

{

    public $course = "PHP";

    private $first_name;

    private $last_name;

    public function setName($fname, $lname)

    {

        $this->first_name = $fname;

        $this->last_name = $lname;

    }

    public function __unset($property)

    {

        unset($this->$property);

    }

}

$test = new Student();

$test->setName("Yahoo","Baba");

echo "<pre>";

print_r($test);

echo "</pre>";

echo "<br>";

unset($test->first_name);

echo "<pre>";

print_r($test);

echo "</pre>";

unset($test->course);

echo "<pre>";

print_r($test);

echo "</pre>";

// echo $test->course;     //Gives Error of Undefined Property

// echo $test->first_name; //Gives Error of Undefined Property

?>