PHP cookies and session not kept - php

Question

I've been google-ing this for a while, and I have reviewed my code over and over again, still no clue about it.
Here is the deal:
I have a multi-language website. When clicking on a different language preference, I pass it thorugh url as ?lang=en, or so.
Then, the code uses GET to read the language, start session and creating a cookie named "lang".
Good so far, and actually it was working perfectly.
I was thinking about creating a subdomain, so I got it and I wanted to use the same cookie through the subdomain and i found that I could achive it using (name, value, time, '/', '.domain.com')
It never worked, so I reverted things back to normal: (name, value, time) and that is it. I used to have it with no path or domain values. Actually it is working the same way with a different website.
Long story short, after reverting changes, I am NOT able to get a session or cookie stored in the browser. I have looked in the stored info and there is no such thing as session or cookies for that site.
Answer: YES, I have cookies enabled, plus, my other sites are working perfectly and other public sites using cookies are working fine as well.
I have tried using echo to print the cookie and session value, still no luck.
Here is part of my handle code:
<?php
session_start();
header('Cache-control: private'); // IE 6 FIX
if(isSet($_GET['lang']))
{
$lang = $_GET['lang'];
// register the session and set the cookie
$_SESSION['lang'] = $lang;
setcookie("lang", $lang, time() + (3600 * 24 * 30));
}
else if(isSet($_SESSION['lang']))
{
$lang = $_SESSION['lang'];
}
else if(isSet($_COOKIE['lang']))
{
$lang = $_COOKIE['lang'];
}
else
{
$lang = 'es';
}
switch ($lang) {
case 'en':
$lang_file = 'lang.en.php';
$lang_dir = 'en';
break;
case 'es':
$lang_file = 'lang.es.php';
$lang_dir = 'es';
break;
default:
$lang_file = 'lang.en.php';
}
include_once 'languages/'.$lang_file;
?>
This one is actually working, since I am using this and works:
<?php
$page = $_GET['page'];
if (!empty($page)) {
$content .='html/'. $lang['DIR_PATH']. '/'. $page. '.html';
include($content);
}
else {
include('html/'. $lang['DIR_PATH']. '/'. 'home.html');
}
?>
Using the link
index.php?lang=en
The previous code reads the "en" value, but as soon as I click any link, it is changed to "es".
If include file would not be working, the $lang['DIR_PATH'] would not work and no content would be displayed. Do you agree? Or am I wrong? But it does and changes language succesfully. The thing is that I can not keep the preference stored.
Thanks in advance

Answer 1

Wow!
Finally I double checked everything.
I got the answer already.
I realized that, somehow (don't know why), my **
php.ini
** file was modified and now was asking for a different path to save the session.
I anyone has this problem, go to php.ini file and look for
session.save_path
And either create the specific folder, or change the path showing there
Thanks for reading, anyway, for your help and your time.