Session

A PHP session variable is used to store information about, or change settings for a user session. Session variables hold information about one single user, and are available to all pages in one application.

To create session two step are there as shown below.

• Start the session.

To start the session session_start() function is used.

• Set the value of the session.

To set the session value the global variable $_SESSION[‘session_name’] is used.

Syntax for setting the value

$_SESSION[‘session_name’] = value;

Example

<?php     

$user="Hemangi";

     $pass="123";

     if($user == "Hemangi")

     {

              session_start();

              $_SESSION['user_name']="Hemangi";

              header("Location: login.php");

     }

?>

Example – login.php

<?php

          session_start();

          echo "Wel - Come".$_SESSION['user_name'];

?>

<a href="logout_ex.php">Logout</a>

To destroy the session there are 3 step to be used.

• Start the session
• Clear the session – to clear the session the function unset is used.
• Destroy the session – to destroy the session the function session_destroy() is to be used.

Example – logout.php

<?php

          session_start();

          unset($_SESSION['user_name']);

          session_destroy();

          echo "Session Destroy successfully";

          echo $_SESSION['user_name'];

?>

Posted By : Hemangi Zala