load_settings.php

<?php 

function load_settings($force_refresh = FALSE, $return_all = FALSE)
{
    global $SESS, $DB, $REGX, $PREFS;

    $settings = array();
    $site_id = $PREFS->ini('site_id');

    if(
        isset($SESS->cache[$this->developer_key][$this->package]['settings']) === FALSE
        || $force_refresh === TRUE
    )
    {
        $query = $DB->query("SELECT settings
                             FROM exp_extensions
                             WHERE class = '{$this->package}_ext'
                             AND settings != ''
                             LIMIT 1");

        if ($query->num_rows > 0)
        {
            $settings = $REGX->array_stripslashes(unserialize($query->row['settings']));
        }
        $default_site_settings = $this->build_default_site_settings();
        $settings[$site_id] = (isset($settings[$site_id]) === FALSE) ? $default_site_settings : array_merge($settings[$site_id], $default_site_settings);
        $SESS->cache[$this->developer_key][$this->package]['settings'] = $settings;
    }

    if($return_all === TRUE)
    {
        $settings = $SESS->cache[$this->developer_key][$this->package]['settings'];
    }
    else
    {
        $settings = $SESS->cache[$this->developer_key][$this->package]['settings'][$PREFS->ini('site_id')];
    }
    $this->settings = $settings;
}