Get Google Page Rank of a Site
Quite often as a webmaster we like to do trades with other webmasters based on the mysterious Google pagerank algorithm. Usually this number is between 0-10. Great for automating trade scripts.
Snippet:
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<?
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// This snippet will return the google pagerank for a given site
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// http://thedevnet.com/php/snippets/get-google-page-rank-of-a-site/
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// usage: $pagerank = getpagerank('http://www.google.com');
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function StrToNum($Str, $Check, $Magic)
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{
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$Int32Unit = 4294967296; // 2^32
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$length = strlen($Str);
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for ($i = 0; $i < $length; $i++)
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{
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$Check *= $Magic;
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// If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31),
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// the result of converting to integer is undefined
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// refer to http://www.php.net/manual/en/language.types.integer.php
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if ($Check >= $Int32Unit)
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{
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$Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));
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//if the check less than -2^31
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$Check = ($Check < -2147483648) ? ($Check + $Int32Unit) : $Check;
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}
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$Check += ord($Str{$i});
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}
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return $Check;
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}
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// Genearate a hash for a url
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function HashURL($String)
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{
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$Check1 = StrToNum($String, 0×1505, 0×21);
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$Check2 = StrToNum($String, 0, 0×1003F);
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$Check1>>=2;
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$Check1=(($Check1 >> 4) & 0×3FFFFC0 ) | ($Check1 & 0×3F);
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$Check1=(($Check1 >> 4) & 0×3FFC00 ) | ($Check1 & 0×3FF);
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$Check1=(($Check1 >> 4) & 0×3C000 ) | ($Check1 & 0×3FFF);
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$T1 = (((($Check1 & 0×3C0) << 4) | ($Check1 & 0×3C)) <<2 ) | ($Check2 & 0xF0F );
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$T2 = (((($Check1 & 0xFFFFC000) << 4) | ($Check1 & 0×3C00)) << 0xA) | ($Check2 & 0xF0F0000 );
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return ($T1 | $T2);
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}
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// generate a checksum for the hash string
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function CheckHash($Hashnum)
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{
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$CheckByte=0;
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$Flag=0;
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$HashStr=sprintf('%u', $Hashnum);
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$length=strlen($HashStr);
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for($i=$length-1; $i>=0; $i–)
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{
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$Re=$HashStr{$i};
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if(1===($Flag % 2))
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{
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$Re+=$Re;
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$Re=(int)($Re/10)+($Re%10);
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}
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$CheckByte+=$Re;
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$Flag++;
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}
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$CheckByte %= 10;
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if (0 !== $CheckByte)
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{
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$CheckByte=10-$CheckByte;
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if (1 === ($Flag % 2) )
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{
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if (1 === ($CheckByte % 2))
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{
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$CheckByte += 9;
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}
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$CheckByte >>= 1;
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}
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}
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return '7'.$CheckByte.$HashStr;
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}
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function getpagerank($url)
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{
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$fp = fsockopen("toolbarqueries.google.com", 80, $errno, $errstr, 30);
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if(!$fp)
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{
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echo "$errstr ($errno)
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\n";
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} else {
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$out="GET /search?client=navclient-auto&ch=".CheckHash(HashURL($url))."&features=Rank&q=info:".$url."&num=100&filter=0 HTTP/1.1\r\n";
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$out.="Host: toolbarqueries.google.com\r\n";
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$out.="User-Agent: Mozilla/4.0 (compatible; GoogleToolbar 2.0.114-big; Windows XP 5.1)\r\n";
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$out.="Connection: Close\r\n\r\n";
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fwrite($fp, $out);
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while(!feof($fp))
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{
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$data=fgets($fp, 128);
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$pos=strpos($data, "Rank_");
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if($pos===false)
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{}
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else
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{
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$pagerank = substr($data, $pos + 9);
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return $pagerank;
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}
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}
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fclose($fp);
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}
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}
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?>
Example:
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<?
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$pagerank = getpagerank('http://www.google.com');
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?>
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Originally posted 2009-10-17 01:10:44.
Popularity: 12%
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