how to store data in session using php

• We cover in this artical these question.
• What is session. how to store data in session in php.
• how to Access data in session in php. 
• how to check session varibale is set or not set in php.
• how to Destroy data in session in php. 

What is session: A special type of variable.

whose value is maintained accross subsequent pages.This variable store data in session.

 sintex: $_SESSION['variable']

How to start session:

Before use session we need to start session .we can use this sintex for start session in php. session_start();

how to store data in session in php:

// Starting session session_start(); // Storing session data $_SESSION["firstname"] = "rakesh";
 $_SESSION["lastname"] = "kumar"; 

These are the two session variable 

$_SESSION["firstname"]
 $_SESSION["lastname"]

how to Access data in session in php:

// Starting session session_start(); // Accessing session data

echo 'Hi, ' . $_SESSION["firstname"] . ' ' . $_SESSION["lastname"];

how to check session varibale is set in php:

if(isset($_SESSION["lastname"]))
 { 
    return true; 
}

how to Destroy data in session in php:

unset($_SESSION["lastname"]);   // for unset session variable

session_destroy();   // for completely remove session