+function check_user_activity($id)
+{
+ $sql = "SELECT COUNT(*) FROM ".TB_PREF."audit_trail WHERE audit_trail.user="
+ . db_escape($id);
+ $result = db_query($sql,"Cant check user activity");
+ $ret = db_fetch($result);
+
+ return $ret[0];
+}
+
+//-----------------------------------------------------------------------------------------------
+function show_users_online()
+{
+ $timeoutseconds = 120;
+
+ $timestamp=time();
+ $timeout=$timestamp-$timeoutseconds;
+ /*
+ This will find out if user is from behind proxy server.
+ In that case, the script would count them all as 1 user.
+ This function tryes to get real IP address.
+ */
+ if (isset($_SERVER['HTTP_CLIENT_IP'])) {
+ $ip = $_SERVER['HTTP_CLIENT_IP'];
+ }
+ elseif (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
+ $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
+ }
+ elseif (isset($_SERVER['HTTP_X_FORWARDED'])) {
+ $ip = $_SERVER['HTTP_X_FORWARDED'];
+ }
+ elseif (isset($_SERVER['HTTP_FORWARDED_FOR'])) {
+ $ip = $_SERVER['HTTP_FORWARDED_FOR'];
+ }
+ elseif (isset($_SERVER['HTTP_FORWARDED'])) {
+ $ip = $_SERVER['HTTP_FORWARDED'];
+ }
+ else {
+ $ip = $_SERVER['REMOTE_ADDR'];
+ }
+
+ // Add user to database
+ db_query("INSERT INTO ".TB_PREF."useronline (timestamp, ip, file) VALUES ('". $timestamp ."','". $ip ."','". $_SERVER['PHP_SELF'] ."')");
+ //Remove users that were not online within $timeoutseconds.
+ db_query("DELETE FROM ".TB_PREF."useronline WHERE timestamp<". $timeout);
+
+ // Select online users
+ $result = db_query("SELECT DISTINCT ip FROM ".TB_PREF."useronline");
+ $users = db_num_rows($result);
+ return "$users ".($users == 1 ? _("user online") : _(" users online"));