public static function active_plugins($idx = false)
{
// create list only once
if (empty(self::$plugins_idx)) {
$all_plugins = self::$site_plugins = get_option('active_plugins', array());
if (is_multisite()) {
self::$network_plugins = array_keys(get_site_option('active_sitewide_plugins', array()));
if (!empty(self::$network_plugins)) {
$all_plugins = array_merge(self::$site_plugins, self::$network_plugins);
}
}
foreach ($all_plugins as $base) {
self::$plugins_idx[$base] = true;
}
}
if ($idx !== false) {
if (isset(self::$plugins_idx[$idx])) {
return self::$plugins_idx[$idx];
} else {
return false;
}
} else {
return self::$plugins_idx;
}
}