PHP Decode

<?   
error_reporting(0); 
function getTopDomainhuo(){ 
        $host=$_SERVER['HTTP_HOST']; 
         
        $matchstr="[^\.]+\.(?:(".$str.")|\w{2}|((".$str.")\.\w{2}))$"; 
        if(preg_match("/".$matchstr."/ies",$host,$matchs)){ 
            $domain=$matchs['0']; 
        }else{ 
            $domain=$host; 
        } 
        return $domain; 
 
} 
$domain=getTopDomainhuo(); 
 
$real_domain='baidu.com'; //   
 
$check_host = 'http://sq.cspoj.com/update.php'; 
$client_check = $check_host . '?a=client_check&u=' . $_SERVER['HTTP_HOST']; 
$check_message = $check_host . '?a=check_message&u=' . $_SERVER['HTTP_HOST']; 
$check_info=file_get_contents($client_check); 
$message = file_get_contents($check_message); 
 
 
 
if($check_info=='1'){ 
   echo '<font color=red>' . $message . '</font>'; 
   die; 
}elseif($check_info=='2'){ 
   echo '<font color=red>' . $message . '</font>'; 
   die; 
}elseif($check_info=='3'){ 
   echo '<font color=red>' . $message . '</font>'; 
   die; 
} 
 
if($check_info!=='0'){ //   
   if($domain!==$real_domain){ 
      echo ''; 
      die; 
   } 
} 
 
unset($domain); 
 
 
require_once 'dbc.php'; //  
class Sendsms 
{ 
  
    public static $accessKeyId     = ACKID; 
    public static $accessKeySecret = AXSET; 
    public static $SignName        = SINAME; 
  
    /** 
     *  
     */ 
    public static function loginSMS($mobile, $code, $TemplateCode = TEMPLATE_CODE_LOGIN) 
    { 
  
        $params = array(); 
  
        // 
        $params["PhoneNumbers"]  = $mobile; 
        // 
        $params["SignName"]      = self::$SignName; 
        // 
        $params["TemplateCode"]  = $TemplateCode; 
        //,  
        $params['TemplateParam'] = ["code" => $code]; 
  
        // :  
        //        $params['OutId'] = "12345"; 
        // : , 7 
        //        $params['SmsUpExtendCode'] = "1234567"; 
        // *** ,  *** 
        if (!empty($params["TemplateParam"]) && is_array($params["TemplateParam"])) { 
            $params["TemplateParam"] = json_encode($params["TemplateParam"], JSON_UNESCAPED_UNICODE); 
        } 
        $paramsArr = ["RegionId" => "cn-hangzhou", "Action" => "SendSms", "Version" => "2017-05-25",]; 
        // catch 
        $content   = self::request("dysmsapi.aliyuncs.com", array_merge($params, $paramsArr)); 
        $_SESSION['code'] = $code; //session 
        $_SESSION['time'] = time()+300; //3 
        var_dump($content); 
        //exit; 
        return $content; 
    } 
  
    /** 
     *  
     * @param type $mobile 
     * @param type $info 
     * @param type $TemplateCode 
     * @return type 
     * ${consignee}${number} 
     */ 
    public static function sendMessageSMS($mobile, $info = [], $TemplateCode = 'SMS_464125752') 
    { 
  
        $params = array(); 
  
        // 
        $params["PhoneNumbers"]  = $mobile; 
        // 
        $params["SignName"]      = self::$SignName; 
        // 
        $params["TemplateCode"]  = $TemplateCode; 
        //,  
        $params['TemplateParam'] = $info; 
  
        // :  
        //        $params['OutId'] = "12345"; 
        // : , 7 
        //        $params['SmsUpExtendCode'] = "1234567"; 
        // *** ,  *** 
        if (!empty($params["TemplateParam"]) && is_array($params["TemplateParam"])) { 
            $params["TemplateParam"] = json_encode($params["TemplateParam"], JSON_UNESCAPED_UNICODE); 
        } 
  
        // catch 
        $content = self::request("dysmsapi.aliyuncs.com", array_merge($params, $paramsArr)); 
        return $content; 
    } 
  
    public static function request($domain, $params, $security = false) 
    { 
        $accessKeyId     = self::$accessKeyId; 
        $accessKeySecret = self::$accessKeySecret; 
  
        $apiParams = array_merge(array( 
            "SignatureMethod"  => "HMAC-SHA1", 
            "SignatureNonce"   => uniqid(mt_rand(0, 0xffff), true), 
            "SignatureVersion" => "1.0", 
            "AccessKeyId"      => $accessKeyId, 
            "Timestamp"        => gmdate("Y-m-d\TH:i:s\Z"), 
            "Format"           => "JSON", 
        ), $params); 
        ksort($apiParams); 
  
        $sortedQueryStringTmp = ""; 
        foreach ($apiParams as $key => $value) { 
            $sortedQueryStringTmp .= "&" . self::encode($key) . "=" . self::encode($value); 
        } 
  
        $stringToSign = "GET&%2F&" . self::encode(substr($sortedQueryStringTmp, 1)); 
  
        $sign = base64_encode(hash_hmac("sha1", $stringToSign, $accessKeySecret . "&", true)); 
  
        $signature = self::encode($sign); 
  
        $url = ($security ? 'https' : 'http') . "://{$domain}/?Signature={$signature}{$sortedQueryStringTmp}"; 
  
        try { 
            $content = self::fetchContent($url); 
            return json_decode($content, true); 
        } catch (\Exception $e) { 
            return false; 
        } 
  
        /** 
         *  
         * {#201  
        +"Message": "OK" 
        +"RequestId": "2F3EFE06-AEA2-4CEE-ADAD-AA189C43C1F3" 
        +"BizId": "410218722821144862^0" 
        +"Code": "OK" 
        } 
         */ 
    } 
  
    private static function encode($str) 
    { 
        $res = urlencode($str); 
        $res = preg_replace("/\+/", "%20", $res); 
        $res = preg_replace("/\*/", "%2A", $res); 
        $res = preg_replace("/%7E/", "~", $res); 
        return $res; 
    } 
  
    private static function fetchContent($url) 
    { 
        $ch = curl_init(); 
        curl_setopt($ch, CURLOPT_URL, $url); 
        curl_setopt($ch, CURLOPT_TIMEOUT, 5); 
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
        curl_setopt($ch, CURLOPT_HTTPHEADER, array( 
            "x-sdk-client" => "php/2.0.0", 
        )); 
  
        if (substr($url, 0, 5) == 'https') { 
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); 
        } 
  
        $rtn = curl_exec($ch); 
  
        if ($rtn === false) { 
            trigger_error("[CURL_" . curl_errno($ch) . "]: " . curl_error($ch), E_USER_ERROR); 
        } 
        curl_close($ch); 
  
        return $rtn; 
    } 
  
    private static function random($length = 6, $numeric = 0) 
    { 
        PHP_VERSION < '4.2.0' && mt_srand((double) microtime() * 1000000); 
        if ($numeric) { 
            $hash = sprintf('%0' . $length . 'd', mt_rand(0, pow(10, $length) - 1)); 
        } else { 
            $hash  = ''; 
            $chars = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789abcdefghjkmnpqrstuvwxyz'; 
            $max   = strlen($chars) - 1; 
            for ($i = 0; $i < $length; $i++) { 
                $hash .= $chars[mt_rand(0, $max)]; 
            } 
        } 
        return $hash; 
    } 
  
} 
session_start(); 
$code = mt_rand(000000,999999); //6 
 
$phone=$_GET['phone']; 
  
Sendsms::loginSMS($phone,$code); 
 ?>