token class

[JackOfBlades]

hi i'm currently making a class that will generate a unique token every 5 minutes, im using this in my form so i could make my form dynamic and avoid some xss, i know it's simple but im just starting out, i'd just like to ask a few questions since this class isn't working the way it's supposed to be,

heres the code :

<?php
class Token
{
    private $token_state;
    private $token_value;
    //private $token_age;

function Token()
{
    $this->setTokenState(true);
    //$this->setTokenValue();
}

//setters
private function setTokenState($token_state)
{
    $this->token_state = $token_state;
}

private function setTokenValue()
{
    $this->token_value = md5(uniqid(rand(), TRUE));
}

//getters
function getTokenState()
{
    return $this->token_state;
}

function getTokenValue()
{
    return $this->token_value;
}

//methods
private function initializeSession()
{
    $this->setTokenValue();
    $_SESSION['token']      = $this->getTokenValue();
    $_SESSION['token_time'] = time();
}

private function validateToken()
{
    if (!isset($_SESSION['token'])) {
        $this->setTokenState(false);
    }else {
        $token_age = time() - $_SESSION['token_time'];
        if ($token_age >= 300) { //if token age is 5 minutes older create a new one
            //$this->setTokenState(false);
            $this->setTokenState(false);
        }
    }
}

function generateToken()
{
    $this->validateToken();
    if (!$this->getTokenState()) {
        $this->initializeSession();
        $this->getTokenValue();
    }
}

//end
}

?>

after that if u test the class on another page :

<?php
session_start();
require_once "token.class.php";

$token = new Token();
$token->generateToken();
$token->getTokenValue();
echo $_SESSION['token'];
echo "<br />";
var_dump($value);
?>

the problem is getTokenValue doesnt return any value at all, but the session has, and to think the session get's it's value from the $token_value in the class Token, im really confuse where i went wrong here, hope u guys can give help out and i'd appreciate if you'd give constructive criticism on my class, and my way of implementing OOP so i can enhance it further, thanks

[laserlight]

I formatted your code and posted it within php bbcode tags. Next time please remember to do that.

the problem is getTokenValue doesnt return any value at all, but the session has, and to think the session get's it's value from the $token_value in the class Token, im really confuse where i went wrong here

You never printed the value returned by $token->getTokenValue(), so calling it had no net effect. You probably wanted to write:

echo $token->getTokenValue();