How to update mysql database automatically after every second?

Question

I want to update the 'last_activity' or 'last_seen' value of user in database.. I wrote following code to achieve this:

$_SESSION['LAST_ACTIVITY'] = time();
$lastseen = $_SESSION['LAST_ACTIVITY'];
$lastseen = date("h:i:sa",$lastseen );

$query = "UPDATE `users` SET `lastseen` = '$lastseen' WHERE `username`='$username'";
$query_run = mysql_query($query);

But the problem is that above code will run only one time .I want it to run each and every second so I could get the latest value of 'last seen'.

PS:I have searched a lot on internet but didn't get specific answer .Please help me.

Answer 1

You don't really want to it - trust me...

but ok

use javascript to make a asynchronous call to a php page where you update the database... if you use jquery use the built-in function

https://api.jquery.com/jquery.get/