<?php
class whoIsOnline {
var $time_to_remain_online;
var $max_time_online;
function whoIsOnline() { }
function setSessionTime($mins) {
$this->time_to_remain_online = time() + ($mins * 60);
$this->max_time_online = $mins * 60; //cleanup time
}
function isOnline($user_id) {
$check = false;
$a = mysql_query("SELECT user_name FROM `online` WHERE user_id=$user_id LIMIT 0,1");
if($a) {
if(mysql_num_rows($a) > 0) {
$check = true;
}
mysql_free_result($a);
}
return $check;
}
function recordUser() {
global $CURUSER;
//check if user is not guest
if(array_key_exists('user_id',$CURUSER)) {
//first time visit?
$tco = $this->time_to_remain_online;
if(!isset($_SESSION['user_online']) || ($_SESSION['user_online'] - time()) <=0) {
if($this->isOnline($CURUSER['user_id'])) {
mysql_query("UPDATE `online` SET log_time=$tco WHERE user_id=$CURUSER[user_id]");
}
else {
mysql_query("INSERT INTO `online` (`user_id`, `user_name`, `log_time`) VALUES($CURUSER[user_id],'$CURUSER[user]',$tco)");
}
$_SESSION['user_online'] = $tco;
}
}
}
function removeOnlineUser($user_id) {
mysql_query("DELETE FROM `online` WHERE user_id=$user_id");
if(isset($_SESSION['user_online'])) {
unset($_SESSION['user_online']);
}
}
//peform cleanup after certain period of time ... this function will be called by cron
function cleanup() {
$inactive = time()-$this->max_time_online;
$query = "DELETE FROM `online` WHERE `log_time` <= $inactive" ;
mysql_query($query);
}
}
?>
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