Wakeup Method

<?php

//serialize() function will convert Object to Array. We pass Object to serialize() function.

//unserialize() function will convert Array to Object. We pass Array to unserialize() function.

//When we use serialize() function at that time __sleep() method will automatically Call.

//When we use unserialize() funtion at that time __wakeup() method will automatically Call.

//__wakeup() is mostly used while making connection with database operations.

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 __sleep()

    {

        return array("first_name","last_name");

    }

    public function __wakeup()

    {

        echo "This is a Wake up Method";

    }

}

$object = new Student();

$object->setName("Hello","World");

$srl = serialize($object);

$unsrl = unserialize($srl);

echo "<pre>";

print_r($unsrl);

echo "</pre>";

//  OUTPUT:

//This is a Wake up Method

// Student Object

// (

//     [course] => PHP

//     [first_name:Student:private] => Hello

//     [last_name:Student:private] => World

// )

?>