加密数字，加密BOOL Base64分行加密

 //加密数字
                    if (checkBox2.Checked)
                    {
                        RegexOptions ops = RegexOptions.Multiline;
                        Regex r = new Regex(@" (\d{1,}) ", ops);
                        if (r.IsMatch(content))
                        {
                            content = r.Replace(content, "(int)\"$1" + CreateFlag()+"\"");
                        }
                    }
                    //加密BOOL
                    if (checkBox3.Checked)
                    {
                        content = content.Replace("true", "(bool)(int)\"" + RandomNum() + CreateFlag() + "\"");
                        Thread.Sleep(20);
                        content = content.Replace("TRUE", "(bool)(int)\"" + RandomNum() + CreateFlag() + "\"");
                        Thread.Sleep(20);
                        content = content.Replace("false", "(bool)(int)\"" + CreateFlag() + "\"");
                        Thread.Sleep(20);
                        content = content.Replace("FLASE", "(bool)(int)\"" + CreateFlag() + "\"");
                        Thread.Sleep(20);
                    }
                    //Base64加密
                    if (checkBox4.Checked)
                    {
                        content = content.Substring(5);//去掉 <?php
                        content = content.Remove(content.Length - 2);//去掉 ?>
                        //分行加密
                        int flag = 0;
                        while(0<(flag = content.IndexOf("\r")))
                        {
                            string temp = content.Substring(flag+1);
                            temp = temp.Replace("\n", "");
                            if (0 < temp.Length)
                            {
                                string lineStr = content.Substring(flag, temp.IndexOf("\r")).Replace("\r", "");
                                content = content.Substring(0, flag + 1).Replace("\r", "") + Base64_encode(lineStr + " ; /*" + CreateFlag() + "*/", true)
                                    + content.Substring(flag + temp.IndexOf("\r") + 1);
                            }
                            else
                            {
                                break;
                            }
                        }
                        //全局加密                       
                        content = "<?php //清如许工作室版权所有\r\n eval (base64_decode(\"" + Base64_encode(content,false) + "\"));?>";
                    }

/// <summary>
        /// Base64加密程序
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public string Base64_encode(string str,bool eval)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(str);
            string temp =  Convert.ToBase64String(bytes);
            if (eval)
            {
                temp = "eval (base64_decode(\"" + temp + "\"));";
            }
            return temp;
        }

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