Question

I have a site that uses wordpress for community purposes, it is installed under subdirectory “mysite/community” but when I try to call wordpress functions into “mysite” I cannot retrieve the logged user.

Here’s my sample code:

require $xcart_dir . DIR_COMMUNITY . '/wp-load.php';

wp_get_current_user();
if ( 0 == $current_user->ID ) {
    echo "Not logged in";
} else {
    echo "Logged in";
}

Answer 1

Cookies can contain a Path, this is probably what you are looking for:
http://codex.wordpress.org/Editing_wp-config.php#Additional_Defined_Constants

To allow the cookie for all path on the domain, use define('COOKIEPATH',"/");.

You can also set the cookie domain in wp-config.php:
http://codex.wordpress.org/Editing_wp-config.php#Set_Cookie_Domain

Use ".example.com" to allow the cookie for all subdomains of example.com.