1: <?php
2: // 7/25/2008 - Updated by Askie (http://www.pkphp.com/)
3: // 3/20/2008 - Updated by Roger Collins (http://www.rogercollins.com/)
4: // to remove graphing step
5:
6: //PageRank Lookup v1.1 by HM2K (update: 31/01/07)
7: //based on an alogoritham found here: http://pagerank.gamesaga.net/
8:
9: class PageRank
10: {
11: //settings - host and user agent
12: var $googlehost='toolbarqueries.google.com';
13: var $googleua='Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5';
14:
15: //convert a string to a 32-bit integer
16: function StrToNum($Str, $Check, $Magic) {
17: $Int32Unit = 4294967296; // 2^32
18:
19: $length = strlen($Str);
20: for ($i = 0; $i < $length; $i++) {
21: $Check *= $Magic;
22: //If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31),
23: // the result of converting to integer is undefined
24: // refer to http://www.php.net/manual/en/language.types.integer.php
25: if ($Check >= $Int32Unit) {
26: $Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));
27: //if the check less than -2^31
28: $Check = ($Check < -2147483648) ? ($Check + $Int32Unit) : $Check;
29: }
30: $Check += ord($Str{$i});
31: }
32: return $Check;
33: }
34:
35: //genearate a hash for a url
36: function HashURL($String) {
37: $Check1 = $this->StrToNum($String, 0x1505, 0x21);
38: $Check2 = $this->StrToNum($String, 0, 0x1003F);
39:
40: $Check1 >>= 2;
41: $Check1 = (($Check1 >> 4) & 0x3FFFFC0 ) | ($Check1 & 0x3F);
42: $Check1 = (($Check1 >> 4) & 0x3FFC00 ) | ($Check1 & 0x3FF);
43: $Check1 = (($Check1 >> 4) & 0x3C000 ) | ($Check1 & 0x3FFF);
44:
45: $T1 = (((($Check1 & 0x3C0) << 4) | ($Check1 & 0x3C)) <<2 ) | ($Check2 & 0xF0F );
46: $T2 = (((($Check1 & 0xFFFFC000) << 4) | ($Check1 & 0x3C00)) << 0xA) | ($Check2 & 0xF0F0000 );
47:
48: return ($T1 | $T2);
49: }
50:
51: //genearate a checksum for the hash string
52: function CheckHash($Hashnum) {
53: $CheckByte = 0;
54: $Flag = 0;
55:
56: $HashStr = sprintf('%u', $Hashnum) ;
57: $length = strlen($HashStr);
58:
59: for ($i = $length - 1; $i >= 0; $i --) {
60: $Re = $HashStr{$i};
61: if (1 === ($Flag % 2)) {
62: $Re += $Re;
63: $Re = (int)($Re / 10) + ($Re % 10);
64: }
65: $CheckByte += $Re;
66: $Flag ++;
67: }
68:
69: $CheckByte %= 10;
70: if (0 !== $CheckByte) {
71: $CheckByte = 10 - $CheckByte;
72: if (1 === ($Flag % 2) ) {
73: if (1 === ($CheckByte % 2)) {
74: $CheckByte += 9;
75: }
76: $CheckByte >>= 1;
77: }
78: }
79:
80: return '7'.$CheckByte.$HashStr;
81: }
82:
83: //return the pagerank checksum hash
84: function getch($url) { return $this->CheckHash($this->HashURL($url)); }
85:
86: //return the pagerank figure
87: function printrank($url)
88: {
89: $urlinfo=parse_url($url);
90: $start=$urlinfo["scheme"]<>""?strlen($urlinfo["scheme"]."://"):0;
91: $url=substr($url,$start);
92:
93: $pr = 0; // default return
94: $ch = $this->getch($url);
95: $fp = fsockopen($this->googlehost, 80, $errno, $errstr, 30);
96: if ($fp) {
97: $out = "GET /search?client=navclient-auto&ch=$ch&features=Rank&q=info:$url HTTP/1.1
";
98: //echo "<pre>$out</pre>
"; //debug only
99: $out .= "User-Agent: {$this->googleua}
";
100: $out .= "Host: {$this->googlehost}
";
101: $out .= "Connection: Close
";
102:
103: fwrite($fp, $out);
104:
105: //$pagerank = substr(fgets($fp, 128), 4); //debug only
106: //echo $pagerank; //debug only
107: while (!feof($fp)) {
108: $data = fgets($fp, 128);
109: //echo $data;
110: $pos = strpos($data, "Rank_");
111: if($pos === false){} else{
112: $pr=substr($data, $pos + 9);
113: $pr=trim($pr);
114: $pr=str_replace("
",'',$pr);
115: return $pr;
116: }
117: }
118: //else { echo "$errstr ($errno)<br />
"; } //debug only
119: fclose($fp);
120: }
121: return $pr;
122: }
123: }
124: //$gpr = new PageRank();
125: //print_r($gpr->printrank("http://www.pkphp.com/"));
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