[Blue182]

I'm working on a custom page.
I followed this tutorial and everything is working fine. I can also use the $vbulletin->db object on the custom page. But if I try to use it inside a function, it just throws Fatal error: Call to a member function on a non-object in....

This is the code:

PHP Code:

[...]
// ######################### REQUIRE BACK-END ############################ 
require_once('./global.php'); 

[...]
// ######################## START MAIN SCRIPT ############################ 
$content[center] = do_something(3);
[...]
// ######################## FUNCTIONS ############################ 
function do_something($value) {
    
    [...]
    $result = $vbulletin->db->query_read($sql);

    while ($array = $vbulletin->db->fetch_array($result))
    {
        [...]
    } 
    return $output;
}