Non-object?

[sheppardzwc]

What am I doing wrong here? I required ./global.php... I thought that initialized all the classes I needed automatically?

PHP Code:

<?php

require_once('./global.php');
error_reporting(E_ALL & ~E_NOTICE);
define('NO_REGISTER_GLOBALS', 1);
define('THIS_SCRIPT', 'referral');
    
// functions

############
# Security #
############

function produceError($error) {
    $error = strval($error);
    die('REFERRAL_ERROR: ' . $error . ' <strong>[KILLSCRIPT=true]</strong>');
}

function validate($type, $validate) {
    $validate_type = $type;
    $validate_tovalidate = $validate;
    return $vbulletin->input->clean($validate_tovalidate, $validate_type);
}

function validateSuper($type, $type2, $validate) {
    $validate_super_type = $type;
    $validate_super_type2 = $type2;
    $tovalidatesuper = $validate;
    $vbulletin->input->clean_gpc($validate_super_type, $tovalidatesuper, $validate_super_type2);
    return $vbulletin->GPC[$tovalidatesuper];
}

########
# Main #
########

function buildEnv() {
    define('ID', $_REQUEST['id']);
        if($_REQUEST['do'] == 'register') {
            define('REGISTER', true);
        } else {
            define('REGISTER', false);
        }
    define('DEV', $dev_enabled);
    define('EMER', $emer_shutdown);
}

function getUser($id) {
    $getuser_id = intval($id);
    $getuser_sql = $db->query_read("SELECT username FROM user WHERE userid='$getuser_id'");
    $getuser_result = $db->fetch_array($getuser_sql);
        if($getuser_result['username']) {
            return $getuser_result['username'];
        } else {
            return 0;
            produceError('Could not find username from userid ' . $getuser_id);
        }
}
 
?>

(not the whole script, just showing where I get the problem)

Fatal error: Call to a member function query_read() on a non-object in /home/blackhat/public_html/forum/referral.php on line 59