<?php  class Cookie  {      /**       * 解密已经加密了的cookie       *       * @param string $encryptedText       * @return string       */      private static function _decrypt($encryptedText)      {          $key = Config::get('secret_key');          $cryptText = base64_decode($encryptedText);          $ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);          $iv = mcrypt_create_iv($ivSize, MCRYPT_RAND);          $decryptText = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $cryptText, MCRYPT_MODE_ECB, $iv);          return trim($decryptText);      }         /**       * 加密cookie       *       * @param string $plainText       * @return string       */      private static function _encrypt($plainText)      {          $key = Config::get('secret_key');          $ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);          $iv = mcrypt_create_iv($ivSize, MCRYPT_RAND);          $encryptText = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $plainText, MCRYPT_MODE_ECB, $iv);          return trim(base64_encode($encryptText));      }             /**       * 删除cookie       *       * @param array $args       * @return boolean       */      public static function del($args)      {          $name = $args['name'];          $domain = isset($args['domain']) ? $args['domain'] : null;          return isset($_COOKIE[$name]) ? setcookie($name, '', time() - 86400, '/', $domain) : true;      }             /**       * 得到指定cookie的值       *       * @param string $name       */      public static function get($name)      {          return isset($_COOKIE[$name]) ? self::_decrypt($_COOKIE[$name]) : null;      }             /**       * 设置cookie       *       * @param array $args       * @return boolean       */      public static function set($args)      {          $name = $args['name'];          $value= self::_encrypt($args['value']);          $expire = isset($args['expire']) ? $args['expire'] : null;          $path = isset($args['path']) ? $args['path'] : '/';          $domain = isset($args['domain']) ? $args['domain'] : null;          $secure = isset($args['secure']) ? $args['secure'] : 0;          return setcookie($name, $value, $expire, $path, $domain, $secure);      }  }