function decrypt($txt, $key = '')
{
strlen($key) > 5 or $key = DT_KEY;
$str = mycrypt(str_replace(array('-P-', '-S-', '-Z-', '-X-'), array('+', '/', '0x', '0X'), $txt), $key, 'DECODE');
return substr($str, -3) == substr($key, 0, 3) ? substr($str, 0, -3) : '';
}
function thumb()
{
date_default_timezone_set('UTC');
$params = $_SERVER["QUERY_STRING"];
$config = loader::config();
$params = mycrypt($params, $config['img_path_key'], 'DE');
$params = @unserialize($params);
if (!$params['path']) {
header($_SERVER['SERVER_PROTOCOL'] . ' 404 Not Found!');
exit;
}
$path = $params['path'];
$this->realpath = get_realpath(ROOTDIR . $path);
if (isset($params['guard']) && $params['guard']) {
//防盗链代码,具体代码需要在插件中实现
include_once INCDIR . 'plugin.php';
$plugin =& loader::lib('plugin');
$Config =& loader::config();
if (!$Config['safemode']) {
$plugin->init_plugins();
}
$plugin->trigger('output_image', $path);
}
$this->pathCheck();
//不处理图片直接输出
if (isset($params['donothing']) && $params['donothing']) {
$this->responseImg();
return;
}
$this->cache_dir = ROOTDIR . 'cache/dimgs/';
$this->param['w'] = isset($params['w']) ? intval($params['w']) : 0;
//intval(getGet('w',0));
$this->param['h'] = isset($params['h']) ? intval($params['h']) : 0;
//intval(getGet('h',0));
$this->param['zoom'] = isset($params['zoom']) ? intval($params['zoom']) : 0;
//getGet('zoom',0);
$open_cache = isset($params['cache']) ? intval($params['cache']) : 0;
$cache_key = md5($path . $this->param['w'] . $this->param['h'] . $this->param['zoom']);
$this->cache_subdir = $this->cache_dir . substr($cache_key, 0, 2);
$this->cache_file = $this->cache_subdir . '/' . $cache_key . '.php';
if ($this->browserCache()) {
//尝试浏览器缓存
exit;
}
if ($open_cache) {
//如果开启了服务器缓存
$this->cleanCache();
if ($this->serverCache()) {
//尝试服务器缓存
exit;
}
if (!$this->processImage()) {
//处理图片
exit('Process image failed!');
}
if ($this->writeToCache()) {
//写入缓存
$this->serverCache();
}
} else {
if (!$this->processImage()) {
exit('Process image failed!');
}
$this->outputImg();
//直接输出图片
$this->imgHandler->close();
}
}
