class pagerank {

    var $url;

    function pagerank ($url) {
        set_time_limit(0);
        $this->url = parse_url('http://' . ereg_replace('^http://', '', $url));
        $this->url['full'] = 'http://' . ereg_replace('^http://', '', $url);
    }

    function getPage ($url) {
        if (function_exists('curl_init')) {
            $ch = curl_init($url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            @curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
            curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
            curl_setopt($ch, CURLOPT_REFERER, 'http://www.google.com/search?hl=en&q=google&btnG=Google+Search');
            return curl_exec($ch);
        } else {
            return file_get_contents($url);
        }
    }

    function getPagerank () {
        $url = 'info:' . $this->url['host'];
        $checksum = $this->checksum($this->strord($url));
        $url = "http://www.google.com/search?client=navclient-auto&ch=6$checksum&features=Rank&q=$url";
        $data = $this->getPage($url);
        preg_match('#Rank_[0-9]:[0-9]:([0-9]+){1,}#si', $data, $p);
        $value = ($p[1]) ? $p[1] : 0;
        return $value;
    }

    function toInt ($string) {
        return preg_replace('#[^0-9]#si', '', $string);
    }

    function to_int_32 (&$x) {
        $z = hexdec(80000000);
        $y = (int) $x;
        if($y ==- $z && $x <- $z){
            $y = (int) ((-1) * $x);
            $y = (-1) * $y;
        }
        $x = $y;
    }

    function zero_fill ($a, $b) {
        $z = hexdec(80000000);
        if ($z & $a) {
            $a = ($a >> 1);
            $a &= (~$z);
            $a |= 0x40000000;
            $a = ($a >> ($b - 1));
        } else {
            $a = ($a >> $b);
        }
        return $a;
    }

    function mix ($a, $b, $c) {
        $a -= $b; $a -= $c; $this->to_int_32($a); $a = (int)($a ^ ($this->zero_fill($c, 13)));
        $b -= $c; $b -= $a; $this->to_int_32($b); $b = (int)($b ^ ($a << 8));
        $c -= $a; $c -= $b; $this->to_int_32($c); $c = (int)($c ^ ($this->zero_fill($b, 13)));
        $a -= $b; $a -= $c; $this->to_int_32($a); $a = (int)($a ^ ($this->zero_fill($c, 12)));
        $b -= $c; $b -= $a; $this->to_int_32($b); $b = (int)($b ^ ($a << 16));
        $c -= $a; $c -= $b; $this->to_int_32($c); $c = (int)($c ^ ($this->zero_fill($b, 5)));
        $a -= $b; $a -= $c; $this->to_int_32($a); $a = (int)($a ^ ($this->zero_fill($c, 3)));
        $b -= $c; $b -= $a; $this->to_int_32($b); $b = (int)($b ^ ($a << 10));
        $c -= $a; $c -= $b; $this->to_int_32($c); $c = (int)($c ^ ($this->zero_fill($b, 15)));
        return array($a,$b,$c);
    }

    function checksum ($url, $length = null, $init = 0xE6359A60) {
        if (is_null($length)) {
            $length = sizeof($url);
        }
        $a = $b = 0x9E3779B9;
        $c = $init;
        $k = 0;
        $len = $length;
        while($len >= 12) {
            $a += ($url[$k + 0] + ($url[$k + 1] << 8) + ($url[$k + 2] << 16) + ($url[$k +3] << 24));
            $b += ($url[$k + 4] + ($url[$k + 5] << 8) + ($url[$k + 6] << 16) + ($url[$k +7] << 24));
            $c += ($url[$k + 8] + ($url[$k + 9] << 8) + ($url[$k + 10] << 16) + ($url[$k +11] << 24));
            $mix = $this->mix($a, $b, $c);
            $a = $mix[0]; $b = $mix[1]; $c = $mix[2];
            $k += 12;
            $len -= 12;
        }
        $c += $length;
        switch($len) {
            case 11: $c += ($url[$k + 10] << 24);
            case 10: $c += ($url[$k + 9] << 16);
            case 9 : $c += ($url[$k + 8] << 8);
            case 8 : $b += ($url[$k + 7] << 24);
            case 7 : $b += ($url[$k + 6] << 16);
            case 6 : $b += ($url[$k + 5] << 8);
            case 5 : $b += ($url[$k + 4]);
            case 4 : $a += ($url[$k + 3] << 24);
            case 3 : $a += ($url[$k + 2] << 16);
            case 2 : $a += ($url[$k + 1] << 8);
            case 1 : $a += ($url[$k + 0]);
        }
        $mix = $this->mix($a, $b, $c);
        return $mix[2];
    }

    function strord ($string) {
        for($i = 0; $i < strlen($string); $i++) {
            $result[$i] = ord($string{$i});
        }
        return $result;
    }

}

$data=new pagerank("tavodns.net"));
$Result = 'Page rankas - '.$data->getPagerank();