Google PR 가치의 PHP 구현 코드

//PageRank Lookup v1.1 by HM2K(업데이트: 31/01/07)
//발견된 알고리즘 기반 여기: http://pagerank.gamesaga.net/

//settings - 호스트 및 사용자 에이전트
$googlehost='toolbarqueries.google.com';
$googleua='Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5';

//字符串转换到32位整数
function StrToNum($Str , $Check, $Magic) {
 $Int32Unit = 4294967296;  // 2^32

 $length = strlen($Str);
 for ($i = 0; $i < $length; $i ) {
 $Check *= $Magic ;
 //float가 정수의 경계를 벗어나는 경우(보통 /- 2.15e 9 = 2^31),
 // 정수로 변환한 결과는 정의되지 않습니다
 // http:/를 참조하세요. /www.php.net/manual/en/언어.types.integer.php
 if ($Check >= $Int32Unit) {
 $Check = ($Check - $Int32Unit * (int) ($ Check / $Int32Unit));
 //체크가 -2^31보다 작은 경우
 $Check = ($Check < -2147483648) ? ($Check $Int32Unit) : $Check;
 }
 $Check = ord($Str{$i});
 }
 return $Check;
}

//将URL进行哈希编码
function HashURL($String) {
 $Check1 = StrToNum($String, 0x1505, 0x21);
 $Check2 = StrToNum($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);
}

//为哈希字符串生成校验码
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;
}

//返回pagerank哈希校验码
function getch($url ) { return CheckHash(HashURL($url)); }

//返回PR值
function getpr($url) {
 global $googlehost,$googleua;
 $ch = getch($url);
 $fp = fsockopen($googlehost, 80, $errno, $errstr, 30);
 if ($fp) {
 $out = "GET /search?client=navclient-auto&ch=$ch&features=Rank&q=info:$ url HTTP/1.1rn";
 //echo "$outn"; //디버그 전용
 $out .= "User-Agent: $googleuarn";
 $out .= "Host: $googlehostrn";
 $out .= "Connection: Closernrn";

 fwrite($fp, $out);

 //$pagerank = substr(fgets($fp, 128), 4); //디버그만
 //echo $pagerank; //디버그만
 while (!feof($fp)) {
 $data = fgets($fp, 128);
 //echo $data;
 $pos = strpos($data , "순위_");
 if($pos === false){} else{
 $pr=substr($data, $pos 9);
 $pr=trim($pr);
 $pr=str_replace("n",'',$pr);
 return $pr;
 }
 }
 //else { echo "$errstr ($errno)< ;br />n"; } //디버그 전용
 fclose($fp);
 }
}

//生成pagerank图shape
function pagerank($url,$width=40,$method= '스타일') {
 if (!preg_match('/^(http://)?([^/] )/i', $url)) { $url='http://'.$url ; }
 $pr=getpr($url);
 $pagerank="PageRank: $pr/10";

 //(이전) 이미지 메소드
 if ($method = = '이미지') {
 $prpos=$width*$pr/10;
 $prneg=$width-$prpos;
 $html='';
 }
 //미리 스타일이 지정된 메서드
 if ($method == 'style') {
 $prpercent=100*$pr/10;
 $html='';
 }

 $out=''.$html.' ';
 return $out;
}

if ((!isset($_POST['url'])) && (!isset($_GET['url']))) { echo ''; }
if (isset($_REQUEST['url'])) { echo pagerank($_REQUEST['url']); }
?>