<?php
//Log the user in
$con = mysql_connect("localhost","username","password");
mysql_query("INSERT INTO onlineUsers (username) VALUE ('$username')") //Assuming the user's username is stored in $username
?>

<?php
//Clear Cookies, etc.
$con = mysql_connect("localhost","username","password");
mysql_query("DELETE FROM onlineUsers WHERE username = '$username'") //Assuming the user's username is stored in $username
?>

<?php
session_start();
$user=$_SESSION['user'];
if(session_is_registered('user')){
$del="DELETE FROM online WHERE user='$user'";
$true=mysql_query($del);
 
 
if($true){
echo"member offline";
 
 
}else{
echo"failed to delete";
}
 
 
 
 
session_unset();
session_destroy();
 
 
//include"index.php";
 
 
//exit();
}else{
include"index.php";
 
}
 
 
?>

<?php
session_start();
 
if(session_is_registered('user'))
{
     $user=$_SESSION['user'];
     $del="DELETE FROM online WHERE user='$user'";
     $result=mysql_query($del);
 
     if($result==true)
     {
          echo "<h3>Member Offline</h3>\n";
     }
     else
     {
         echo "<h3>Failed to Logoff</h3>\n";
     }
 
     //Remove the Session Vars
     $_SESSION = array();
     if (isset($_COOKIE[session_name()])) {
          setcookie(session_name(), '', time()-42000, '/');
     }
     session_destroy();
 
 
     //include"index.php";
 
}
else
{
    include "index.php";
}
?>

<?
$number=0;
// define the directory to save sessions in
session_save_path("session_directory");
session_start();
// set the session as active
$_SESSION['active']="yes";
$directory = opendir("sessions");
while($item = readdir($directory))
{
  if(($item != ".") && ($item != ".."))
  {
// count the number os sessions active within the last x sexonds
    if(fileatime('sessions/' . $item) > time()-120)
    {
// add 1 to the session count
      $number++;  
    }
  }
}
closedir($directory);
session_unset();
// return the value
return ($number=='1') ? "There is " . $number . " user online now." : "There are " . $number . " users online now."; 
?>