<?php
ext::creatapp();
class ext
{
private static $_app;
public static $user_realname = array();
public static $role_name = array();
public static $d_name = array();
public static $school_name = array();
public static function app()
{
return self::$_app;
}
public static function creatapp()
{
if (!is_object(self::$_app)) {
self::$_app = site_init::instance();
}
return self::$_app;
}
public static function authcode($string, $operation = 'DECODE', $key = '', $expiry = 0)
{
$ckey_length = 4;
$key = md5($key != '' ? $key : self::getglobal('authkey'));
$keya = md5(substr($key, 0, 16));
$keyb = md5(substr($key, 16, 16));
$keyc = $ckey_length ? $operation == 'DECODE' ? substr($string, 0, $ckey_length) : substr(md5(microtime()), -$ckey_length) : '';
$cryptkey = $keya . md5($keya . $keyc);
$key_length = strlen($cryptkey);
$string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0) . substr(md5($string . $keyb), 0, 16) . $string;
