Chamilo is a learning management system focused on ease of use and accessibility
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chamilo-lms/main/inc/ajax/online.ajax.php

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<?php
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
require_once '../global.inc.php';
$action = $_GET['a'];
switch($action) {
case 'load_online_user':
$page = intval($_REQUEST['online_page_nr']);
if (isset($_GET['cidReq']) && strlen($_GET['cidReq']) > 0) {
$user_list = who_is_online_in_this_course(api_get_user_id(), api_get_setting('time_limit_whosonline'), $_GET['cidReq']);
} else {
$user_list = who_is_online(api_get_setting('time_limit_whosonline'));
}
if ($page == 2) {
$_SESSION['online_user_items'] = array();
}
$max_page = round(count($user_list)/10);
if (!in_array($page, $_SESSION['online_user_items']) && $page <= $max_page) {
$_SESSION['online_user_items'][] = $page;
echo SocialManager::display_user_list($user_list);
} else {
echo 'end';
}
break;
default:
break;
}