#region Md5加密
        public String EncryptCode(string pwd)
        {
            Byte[] clearBytes = new UnicodeEncoding().GetBytes(pwd);
            Byte[] hashedBytes = ((HashAlgorithm)CryptoConfig.CreateFromName("MD5")).ComputeHash(clearBytes);
            String tt = BitConverter.ToString(hashedBytes).Replace("-", "");
            return tt;
        }
        #endregion上面这段代码是.net的md5的函数,用PHP怎么来实现上面代码的功能?请指教,在线等,急~~