<?phpclass OA {    public static $oa = array();    public static $config = array();    public static function setConfig(array $config) {        return self::$config = array_merge(self::$config, $config);    }    public static function user() {        oa_import("user");        if (!key_exists(‘user‘, self::$oa) || !is_object(self::$oa[‘user‘])) {            self::$oa[‘user‘] = new user();        }        return self::$oa[‘user‘];    }}

<?php
　　OA::setconfig($config);　　OA::user()->get();
?>