Online Status for Multiple Users - php

Question

I was able to do online status but works only for one user. When I login, it shows all users on users.php online even when they are offline.
Here is the Status Code:
session_start();
include_once 'db_connect.php' ;
if(isset($_SESSION['users'])) {
$setLogged= mysql_query("UPDATE `users` SET `lastlogin` = '$last' WHERE `id` = '".$_SESSION['users']."'") or die(mysql_error());
}
$last = strtotime(date('Y-m-d H:s'));
$loggedtime = time() - 300; // 5 minutes
if($last > $loggedtime) {
echo '<font color="green" size="3px">online</font>';
} else {
echo '<font color="red" size="3px">offline</font>';
}
?>
I need help on how to make it work for multiple users.
Thanks. ;)

Answer 1

You have to use something like this:
$query=mysql_query("SELECT id FROM users WHERE last_login>NOW()-INTERVAL 30 MIN");
while($array=mysql_fetch_assoc($query)){
//Do something with the id's or the info you get for user who have there last login
//in the last 30mins
}
As #Crisp says in the comment above your query for last_login should be updated too, you can use mysql now() function like this:
$setLogged= mysql_query("UPDATE `users` SET `lastlogin` = NOW() WHERE `id` = '".$_SESSION['users']."'") or die(mysql_error());
Note you have to stop using mysql_* as these functions are deprecated, start using PDO or mysqli