Google PageRank Component (Articles) | The Bakery, Everything CakePHP

Google PageRank Component

By Chad R Smith (chadsmith729)

Google Page Ranking is being used less and less, but it's still out there and offered by accessing google's servers. When talking about Search Engine Optimization the main items to look at are Trust and Authority, however Google/Yahoo/Bing are not releasing the ability to get that information yet. Page Rank will just have to do for the time being.

This component will access google.com and and find the Google PageRank for any given URL. You could also add other domains to the $googleDomains variable, but doing so adds to the response time.

/app/controllers/components/googlepagerank.php

Component Class:

Download code


<?php 

class GooglepagerankComponent {

    //Public vars

    var $googleDomains = Array("www.google.com");

        // You can add more google owned domains here to check, but it increases the time to execute.

    

    var $debugResult = Array();

    var $userAgent = "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20021204";

    var $cacheDir = "/tmp";

    var $maxCacheAge = 86400; // = 24h (yes, in seconds)

    var $useCache = false;

    var $debug = false;



    //Private vars

    var $PageRank = -1;

    var $cacheExpired = false;





    function GetPR($url,$forceNoCache = false) {

        $total_exec_start = $this->microtimeFloat();

        $result=array("",-1);



        if (($url.""!="")&&($url.""!="http://")) {



            $this->debugRes("url", $url);



            $this->cacheDir .= (substr($this->cacheDir,-1) != "/")? "/":"";



            // check for protocol

            $url_ = ((substr(strtolower($url),0,7)!="http://")? "http://".$url:$url);

            $host = $this->googleDomains[mt_rand(0,count($this->googleDomains)-1)];

            $target = "/search";

            $querystring = sprintf("client=navclient-auto&ch=%s&features=Rank&q=%s",

                $this->CheckHash($this->HashURL($url_)),urlencode("info:".$url_));

            $contents="";



            $this->debugRes("host", $host);

            $this->debugRes("query_string", $querystring);

            $this->debugRes("user_agent", $this->userAgent);



            $query_exec_start = $this->microtimeFloat();



            if ($forceNoCache == true) {

                $this->debugRes("force_no_cache", "true");

            } elseif ($contents = $this->readCacheResult($url)) {

                $this->debugRes("read_from_cache", "true");

            } else {

                $this->cacheExpired = true;

            }





            // let's get ranking

            if (strlen(trim($contents)) == 0)

            if (@function_exists("curl_init")) {



                // allways use curl if available for performance issues

                $ch = curl_init();

                curl_setopt($ch, CURLOPT_URL, "http://".$host.$target."?".$querystring);

                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

                curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);

                curl_setopt($ch, CURLOPT_USERAGENT, $this->userAgent);

                if (!($contents = trim(@curl_exec($ch)))) {

                    $this->debugRes("error","curl_exec failed");

                }

                curl_close ($ch);

                $this->debugRes("method", "curl");



            } else {

                $this->debugRes("error","curl not installed, trying to use fsockopen");

                // use fsockopen as secondary method, to submit user agent

                if ($socket  = @fsockopen($host, "80", $errno, $errstr, 30)) {



                    $request  = "GET $target?$querystring HTTP/1.0\r\n";

                    $request .= "Host: $host\r\n";

                    $request .= "User-Agent: ".$this->userAgent."\r\n";

                    $request .= "Accept-Language: en-us, en;q=0.50\r\n";

                    $request .= "Accept-Charset: ISO-8859-1, utf-8;q=0.66, *;q=0.66\r\n";

                    $request .= "Accept: text/xml,application/xml,application/xhtml+xml,";

                    $request .= "text/html;q=0.9,text/plain;q=0.8,video/x-mng,image/png,";

                    $request .= "image/jpeg,image/gif;q=0.2,text/css,*/*;q=0.1\r\n";

                    $request .= "Connection: close\r\n";

                    $request .= "Cache-Control: max-age=0\r\n\r\n";



                    stream_set_timeout ( $socket,10);

                    fwrite( $socket, $request );

                    $ret = '';

                    while (!feof($socket)) {

                        $ret .= fread($socket,4096);

                    }

                    fclose($socket);

                    $contents = trim(substr($ret,strpos($ret,"\r\n\r\n") + 4));

                    $this->debugRes("method", "fsockopen");

                } else {

                    $this->debugRes("error","fsockopen failed, trying file_get_contents");

                    // this way could cause problems because the Browser Useragent is not set...

                    if ($contents = trim(@file_get_contents("http://".$host.$target."?".$querystring))) {

                        $this->debugRes("method", "file_get_contents");

                    } else {

                        $this->debugRes("error","file_get_contents failed");

                    }

                }



            }



            if ($this->cacheExpired == true)

            $this->updateCacheResult($url,$contents);



            $this->debugRes("query_exec_time",$this->microtimeFloat() - $query_exec_start);



            $result[0]=$contents;

            // Rank_1:1:0 = 0

            // Rank_1:1:5 = 5

            // Rank_1:1:9 = 9

            // Rank_1:2:10 = 10 etc

            $p=explode(":",$contents);

            if (isset($p[2])) $result[1]=$p[2];

        }



        if($result[1] == -1) $result[1] = 0;

        $this->PageRank =(int)$result[1];

        $this->debugRes("total_exec_time", $this->microtimeFloat() - $total_exec_start);

        $this->debugRes("result", $result);

        return $this->PageRank;



    }





    function debugRes($what,$sowhat) {

        if($this->debug == true) {

            $debugbt = debug_backtrace();

            $what = trim($what);

            $sowhat = trim($sowhat) . " (Line : ".$debugbt[0]["line"].")";

            if ($what == "error") {

                $this->debugResult[$what][] = $sowhat;

            } else {

                $this->debugResult[$what] = $sowhat;

            }

        }

    }



    function microtimeFloat() {

        list($usec, $sec) = explode(" ", microtime());

        return ((float)$usec + (float)$sec);

    }





    function readCacheResult($url) {

        if ($this->useCache != true) {

            return false;

        }



        if (!is_dir($this->cacheDir)) {

            $this->debugRes("error","please create {$this->cacheDir}");

            return false;

        }



        $urlp = parse_url($url);

        $host_ = explode(".",$urlp["host"]);

        $path_ = (strlen($urlp["query"])>0)? urlencode($urlp["path"].$urlp["query"]):"default";



        $cache_file = $this->cacheDir;



        for ($i = count($host_)-1;$i>=0;$i--) {

            $cache_file .= $host_[$i]."/";

        }



        $cache_file .= $path_;

        $this->debugRes("cache_file", $cache_file);

        if (file_exists($cache_file)) {

            $mtime = filemtime($cache_file);

            if (time() - $mtime > $this->maxCacheAge) {

                $this->debugRes("cache", "expired");

                $this->cacheExpired = true;

                return false;

            } else {

                $this->cacheExpired = false;

                $this->debugRes("cache_age", time() - $mtime);

                return file_get_contents($cache_file);

            }

        }

        $this->debugRes("error","cache file not exists (reading)");

        return false;

    }



    function updateCacheResult($url,$content) {

        if ($this->useCache != true) {

            return false;

        }



        if (!is_dir($this->cacheDir)) {

            $this->debugRes("error","please create {$this->cacheDir}");

            return false;

        }



        $urlp = parse_url($url);

        $host_ = explode(".",$urlp["host"]);

        $path_ = (strlen($urlp["query"])>0)? urlencode($urlp["path"].$urlp["query"]):"default";



        $cache_file = $this->cacheDir;

        for ($i = count($host_)-1;$i>=0;$i--) {

            $cache_file .= $host_[$i]."/";

        }



        $cache_file .= $path_;



        if (!file_exists($cache_file)) {

            $this->debugRes("error","cache file not exists (writing)");

            $cache_file_tmp = substr($cache_file,strlen($this->cacheDir));

            $cache_file_tmp = explode("/",$cache_file_tmp);

            $cache_dir_ = $this->cacheDir;

            for ($i = 0;$i<count($cache_file_tmp)-1;$i++) {

                $cache_dir_ .= $cache_file_tmp[$i]."/";

                if (!file_exists($cache_dir_)) {

                    if (!@mkdir($cache_dir_,0777)) {

                        $this->debugRes("error","unable to create cache dir: $cache_dir_");

                        //break;

                    }

                }

            }

            if (!@touch($cache_file)) $this->debugRes("error","unable to create cache file");

            if (!@chmod($cache_file,0777)) $this->debugRes("error","unable to chmod cache file");

        }



        if (is_writable($cache_file)) {

            if (!$handle = fopen($cache_file, 'w')) {

                $this->debugRes("error", "unable to open $cache_file");

                return false;

            }

            if (fwrite($handle, $content) === FALSE) {

                $this->debugRes("error", "unable to write to $cache_file");

                return false;

            }

            fclose($handle);

            $this->debugRes("cached", date("Y-m-d H:i:s"));

            return true;

        }

        $this->debugRes("error", "$cache_file is not writable");

        return false;



    }



    //convert a string to a 32-bit integer

    function StrToNum($Str, $Check, $Magic) {

        $Int32Unit = 4294967296;  // 2^32

        $length = strlen($Str);

        for ($i = 0; $i < $length; $i++) {

            $Check *= $Magic;     

            //If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31), 

            //  the result of converting to integer is undefined

            //  refer to http://www.php.net/manual/en/language.types.integer.php

            if ($Check >= $Int32Unit) {

                $Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));

                //if the check less than -2^31

                $Check = ($Check < -2147483648) ? ($Check + $Int32Unit) : $Check;

            }

            $Check += ord($Str{$i}); 

        }

        return $Check;

    }



    //genearate a hash for a url

    function HashURL($String) {

        $Check1 = $this->StrToNum($String, 0x1505, 0x21);

        $Check2 = $this->StrToNum($String, 0, 0x1003F);

        $Check1 >>= 2;     

        $Check1 = (($Check1 >> 4) & 0x3FFFFC0 ) | ($Check1 & 0x3F);

        $Check1 = (($Check1 >> 4) & 0x3FFC00 ) | ($Check1 & 0x3FF);

        $Check1 = (($Check1 >> 4) & 0x3C000 ) | ($Check1 & 0x3FFF);    

        

        $T1 = (((($Check1 & 0x3C0) << 4) | ($Check1 & 0x3C)) <<2 ) | ($Check2 & 0xF0F );

        $T2 = (((($Check1 & 0xFFFFC000) << 4) | ($Check1 & 0x3C00)) << 0xA) | ($Check2 & 0xF0F0000 );

        

        return ($T1 | $T2);

    }

    

    //genearate a checksum for the hash string

    function CheckHash($Hashnum) {

        $CheckByte = 0;

        $Flag = 0;

        $HashStr = sprintf('%u', $Hashnum) ;

        $length = strlen($HashStr);

        

        for ($i = $length - 1;  $i >= 0;  $i --) {

            $Re = $HashStr{$i};

            if (1 === ($Flag % 2)) {              

                $Re += $Re;     

                $Re = (int)($Re / 10) + ($Re % 10);

            }

            $CheckByte += $Re;

            $Flag ++;    

        }

    

        $CheckByte %= 10;

        if (0 !== $CheckByte) {

            $CheckByte = 10 - $CheckByte;

            if (1 === ($Flag % 2) ) {

                if (1 === ($CheckByte % 2)) {

                    $CheckByte += 9;

                }

                $CheckByte >>= 1;

            }

        }

        return '7'.$CheckByte.$HashStr;

    }

}

?>

Now we have the component set up and working. Let's access and run a test.

Controller - /app/controllers/googlepageranks_controller.php

Controller Class:

Download code


<?php 

class GooglepageranksController extends AppController {

    var $name = 'Googlepageranks';

    var $components = array('Googlepagerank');

    

    /*-----------------------------------------------------------

        Google Page Rank

    -------------------------------------------------------------*/

    function googlepr($theURL){

        $this->autoRender = false;

        $this->autoLayout = false;

        // Send to google.com and get the PageRank

        echo $this->Googlepagerank->GetPR($theURL);

    }

}

?>

Open a web browser and go to http://{domain}/googlepageranks/googlepr/http%3a%2f%2fintegrascan.com
The output should say something like: 4

This is also available as a free API courtesy of The Easy API http://theeasyapi.com.

Happy Baking,
Chad

Comments

CakePHP Team Comments Author Comments

Comment

1 Nice..

Thanks for the code, i always believed Google PR was something that wasn't directly accessible and had to be somehow 'stolen' indirectly from the Google toolbar.
Will check it and see if it works(i'm sure it does though).
Regards,
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Comment

2 Pr effects...

I think PR will always be around but all it really shows is how often a page gets spidered. My potty training site was PR2 and now after the update it has gone to a PR4.

Comment

3 great post

Nice read on the famous google PR, but i though the where going to do away with that in their algorithm. I use to think this was the most important factor with googles index which intern would allow me to make money, but i see page rank is meaningless!

Comment

4 good one

Its really an informative write up by Chad. Its a truth that the Google page ranking is not used much now a days. But it is still out there. While we think about the search engines , the trust and authority plays an important role. But still not much clarity is obtained in this area. Page rank will just have to do for time being. I have downloaded the code just for my information. I followed the procedure after downloading the code and got the output as you said. But page rank is not permanent and keeps on changing . Call Center Software .

Comment

5 Google page rank

To be honest i have always tried my best to get the higher page rank for all my websites, by God's grace I have been successful enough in achieving the high rankings. Will continue to do my efforts in the future as well.
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6 PR Importance

Google PR's will be always around as long as users give the value ot it.
Personally it matters to me. Chad what you mean trust and authority, explain?. cheers NYC limousine service

Comment

7 Page Rank

This is a great article about page rank. I really do not get caught up in pr but it is a real show of a site Kathy Purses.

Comment

8 Google PR

Heilerschule say great PHP Code, many Thanks for sharing

Comment

9 Re:Google PageRank Component

I am really interested in this program but I do not know much about it. After reading your article, i have more experiences to work with it. Your post is interesting and picturesque. I hope i can get your post in next time. Keep on!
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10 Google Page Rank

I appreciate you for sharing this information. Nice read about Google Page Rank. Neus Gator

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11 thanks

This is a great article about page rank. I really do not get caught up in pr but it is a real show of a site.. identity theft protection

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12 nice

I really do not get caught up in pr but it is a real show of a site.

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13 hey

PR seems to ahve lost most of it's shine but it's still a metric that people put a lot of faith in for some reason. I think the underlying factors influencing PR are still very valid, but the PR number itself is pretty meaningless imho.

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14 thank you very much!

I really do not get caught up in pr but it is a real show of a site.
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15 Nice one

I really not able to understand why my PR not up,However i can see improvement in alexa !
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Comment

16 thanks

This is a good article, and have a high page rank. this is great PHP Code, thanks for sharing.

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17 Excellent Component

This is an excellent component. I was able to implement it and I'm grateful for the shortcut as I did not want to, nor am I sure I could have, done it myself. Caretaker Pool Systems - Social Bookmarks Eintragen

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18 cool

What results are you getting with your implementation?

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19 PR

Comment

20 you're probably right

I agree PR is becoming less and less important. Google says that this is just one of the many factors to determine authority. I think they are just saying that because they want to stop the online high PR text link brokerage. But who knows
You're probably right.. BUT.. I don't really see it slowing down.. it's the one thing that people can visibly take note of.. so, it is what it is I guess. PR 'seems' to make a difference for me.. but maybe it's just in my head. who knows..
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21 Google pagerank component

This is true Google PR now becoming less important and dependent on how many link back you have from high PR sites !
So it may be dependent on back link from others to you. But some of SEO experts talk a lot of about it.
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22 well..

well.. I'm pretty sure most people understand that by now.. that's what gives you PR after all anyway. So.. yeah.. that's pretty much confirmed I think. That's how I promote my Eismaschine & dog diets sites successfully.

Comment

23 thank you

Thank you very nice code.
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24 Thank you

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25 ed

When the majority of people will see the realistic way to solve that over time that it starts to blend suddenly. auto transport Yes, the will be read again without any doubt.

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26 great tutorial

This is quite an impressive undertaking.. I appreciate your time and effort in this guide. I'm going to do my best to follow it to a T and not ask too many questions :) My expertise is more in folding knife & pocket knife - which doesn't help me here at all unfortunately for me
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27 amazing contribution

This is an amazing contribution.. really.. I'm going to get to work looking into this ASAP.. busy listening to some hot gothic tunes right now.
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28 Simply not true.

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29 Google PR

It is constant fight with Google to get high page rank I rank my electrical site to the first page in
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30 Thank you

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31 PR

It seems PR have lost most of it's shine but it's still a metric that people put a lot of faith in for some reason. And I think the underlying factors influencing PR are still very valid .
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32 Thanks and

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33 help

I'm pretty sure most people understand that by now, so thanks for your article.
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34 How

How do I compile and implement this code into a toolbar?

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