php redirect when idle not redirecting - header

Question

I found the following script at https://thisinterestsme.com/expire-php-sessions.
This code is used to check if user is inactive for a period
logout and direct to login screen.
problem
Redirect does not happen. Redirect happens only when page is refreshed.
script
<!-- language: lang-html -->
<?php $inactive = 30;
$_SESSION['inactive']=$inactive;
if( !isset($_SESSION['timeout']) )
$_SESSION['timeout'] = time() + $inactive;
$session_life = time() - $_SESSION['timeout'];
$_SESSION['life']=$session_life;
if ($session_life > $inactive)
{ session_destroy();
echo '<script>';
echo 'console.log("You have been logged-out!");';
echo 'window.location.href="login.php"';
echo '</script>';
}
$_SESSION['timeout']=time();
?>
Redirect happens only when I refresh the page
instead of echo 'window.location.href="login.php"' I triedheader("Location: login.php") but no success (NO auto redirect to "login" page ).
What shall I do so that the page will be redirected without refresh?
I am using PDO+ php 7
I found a thread and tried this:
<meta http-equiv="refresh" content="900;url=login.php" />
But this does not check whether "idle" or NOT.
Thanks in advance

Answer 1

I wish to share the complete answer.
Check whether idle for 30 seconds (15 minutes). If yes (idle for 30 seconds) destroy the session. Here's a code snippet to be cut and paste on top of web page:
<?php
session_start();
if (!isset($_SESSION['loginid']))
{
header("Location: login.php");
}
// store inactive time
$inactive = 30;
$_SESSION['inactive']=$inactive;
if( !isset($_SESSION['timeout']) )
$_SESSION['timeout'] = time() + $inactive;
$session_life = time() - $_SESSION['timeout'];
$_SESSION['life']=$session_life;
if ($session_life > $inactive)
{ session_destroy();
unset($_SESSION['loginid']);
header("Location: login.php");
}
$_SESSION['timeout']=time();
?>
Check whether idle for more than 30 seconds. Here's jQuery code (cut and paste in common sharing file normally used with Include_once("xxxx.php").
$(function(){
function refreshDiv(){
$.ajax({
url: 'checkidletime.php'
}).done(function(result) {
$('#refreshDIV').html(result);
window.setTimeout(refreshDiv, 5000);
});
}
window.setTimeout(refreshDiv, 5000);
});
Checkidletime.php called by above function refreshDiv (part of include file):
session_start();
$session_life = time() - $_SESSION['timeout'];
if ($session_life > $_SESSION['inactive'] )
{ unset($_SESSION['loginid']);
?>
<script>
location.reload();/* refresh page
</script>
<?php
}