How to automatically refresh a page and redirects to login page when session has expired (PHP)

Question

Please excuse me, I know there are some questions on stack overflow regarding this, but I don't find any solution that suits my problem. I've a problem, when the session is expired the page is not reloading automatically. Please help. Thank You! Any help would be appreciated.

This is the code I've tried, $_SESSION['created'] = time();

if((time() - $_SESSION['created']) > 600) {
    header("Refresh: 1;url='logout.php'");
} else {
    $_SESSION['created'] = time();
}

Answer 1

As per your need you have to check the session each seconds once session is valid or not in server side so do something like this.

1) Created a javascript and ajax for checking a session is expired or not in server side each seconds once

2) session.php page to check the valid session or not

3) Then return the 1 or -1 based on that trigger the location.reload() function it automatically moved to logout.php because your top condition become true now.

session.php

        <?php

            session_start();


            if(!isset( $_SESSION['created'] ) || (time() - $_SESSION['created']) > 600) {

                session_destroy();

                echo "-1";

            } else {

                echo "1";

            }

        ?>

Paste this javascript in each and every page

Java Script :

        <script type="text/javascript">

                function session_checking()
                {
                    $.post( "session.php", function( data ) {

                        if(data == "-1")
                        {
                            alert("Your session has been expired!");
                            location.reload();
                        }

                    });
                }

                var validateSession = setInterval(session_checking, 1000);

    </script>

This code should be each page top

if(!isset( $_SESSION['created'] ) || (time() - $_SESSION['created']) > 600)   {
header("Refresh: 1;url=logout.php");
} else {
$_SESSION['created'] = time();
}