issue with static class property in php - php

Question

I am working on a simple anonymous login system and I have a Session class which looks like this:
<?php
class Session
{
private static $cookieLifeSpanInDays;
public function __construct()
{
self::$cookieLifeSpanInDays = 1825;
}
public static function loginUser()
{
if (!Session::isLoggedIn())
{
// Login User
$session_id = Session::newSessionId();
$name = Session::newUserName($session_id);
if (empty($name))
throw new Exception('Failed to generate a unique user name. Try again later.');
DB::insert('users', array(
'name' => $name,
'session_id' => $session_id,
'last_login' => time()
));
setcookie("sessionId", $session_id, time() + (self::$cookieLifeSpanInDays * 86400), '/', $_SERVER['HTTP_HOST']);
$_SESSION['isLoggedIn'] = true;
var_dump(self::$cookieLifeSpanInDays);
var_dump($_COOKIE);
exit();
}
// Defaults
return true;
}
}
When I call the class like this: Session::loginUser();
The var_dumps() in the loginUser function looks like this:
So, my login function is broken (no cookie is getting set) because the static property on class self::$cookieLifeSpanInDays is null. What am I doing wrong here?

Answer 1

I've fixed it:
<?php
class Session
{
private static $cookieLifeSpanInDays = 1825;
public static function loginUser()
{
if (!Session::isLoggedIn())
{
// Login User
$session_id = Session::newSessionId();
$name = Session::newUserName($session_id);
if (empty($name))
throw new Exception('Failed to generate a unique user name. Try again later.');
DB::insert('users', array(
'name' => $name,
'session_id' => $session_id,
'last_login' => time()
));
setcookie("sessionId", $session_id, time() + (self::$cookieLifeSpanInDays * 86400));
$_SESSION['isLoggedIn'] = true;
var_dump(self::$cookieLifeSpanInDays);
var_dump($_COOKIE);
exit();
}
// Defaults
return true;
}
}