I have miniBB in a subdirecotory of my site.

I use the function below to read out the usernamen from the session.

function getUserName(){
if(isset($_SESSION['minimalistBBSession'])) {
$cookievalue=explode ('|', $_SESSION['minimalistBBSession']);
if(!ini_get('magic_quotes_gpc')) $cookievalue[0]=addslashes($cookievalue[0]);
$cookievalue[1]=str_replace("'",'',$cookievalue[1]);
}
else $cookievalue=array('','','');
return $cookievalue[0];
}

But it only works inside the miniBB dir, how can i make it work outside that dir?

Probably, your server's configuration allows read the session variables only from the folder, where they've been set up. There is no solution except that you need to change configuration in the server itself.

session.cookie_path = /
I guess that means that is not the problem.

So, why you are reading $_SESSION variable? By default, miniBB uses cookies (and we recommend to disable sessions, since using cookies is enough). It only will work if you have $useSessions=TRUE; in setup_options.php. Do you have this setting enabled? Or you can try to disable it and try with $_COOKIE... the same way as it is in bb_cookie.php

I'm also having a similar problem as LeeuW, my forum is located in subfolder /forum, when I try and access the cookies set by the forum in the main site folder it comes back blank, I 've tried using:

print_r($_COOKIE);

But still it comes back empty, If I change the cookie path to "/" the login in the forum refuses to work completely.

Any Ideas on how to solve this?

I solved the problem by modifying the setMyCookie() method in the bb_cookie.php file, I added the following code while stil retaining the existing code:

setcookie($GLOBALS['cookiename'], $userName.'|'.$userPass.'|'.$userExpTime, $GLOBALS['cookieexptime'], '/', $GLOBALS['cookiedomain'], $GLOBALS['cookiesecure']);

This sets a cookie that is accessible from the "/" path, I can now access the cookie from whichever directory I chose.

I also had to modify the deleteMyCookie() method to destroy the cookie:

setcookie($GLOBALS['cookiename'], '', (time()-2592000), '/', $GLOBALS['cookiedomain'], $GLOBALS['cookiesecure']);

Don't know why you needed to edit these functions, if $cookiepath setting is given in setup_options.php ;-)