Google PageRank Component
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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.
Now we have the component set up and working. Let's access and run a test.
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
/app/controllers/components/googlepagerank.php
Component Class:
<?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:
<?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
I´am currently running some tests with this code, will get back to you with some reviews, though.
Best wishes
News
Will check it and see if it works(i'm sure it does though).
Regards,
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