PHP
Статьи о PHP
Скрипт определяет Google Page Rang для сайта
Класс позволяет автоматически определить Google Page Rang для сайта.
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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 | <?php /********************************************************************** GooglePR -- Calculates the Google PageRank of a specified URL Authors : Emre Odabas (emre [at] golge [dot] net) Version : 2.0 Description What is Google PageRank? PageRank is a family of algorithms for assigning numerical weightings to hyperlinked documents (or web pages) indexed by a search engine. Its properties are much discussed by search engine optimization (SEO) experts. The PageRank system is used by the popular search engine Google to help determine a page's relevance or importance. As Google puts it: > PageRank relies on the uniquely democratic nature of the web by > using its vast link structure as an indicator of an individual > page's value. Google interprets a link from page A to page B as > a vote, by page A, for page B. But Google looks at more than the > sheer volume of votes, or links a page receives; it also analyzes > the page that casts the vote. Votes cast by pages that are > themselves "important" weigh more heavily and help to make other > pages "important." For more info: http://www.google.com/corporate/tech.html http://en.wikipedia.org/wiki/PageRank http://www.google.com/webmasters/4.html This class will calculate and return the Google PageRank of the specified input URL as integer. Class was build based on Raistlin Majere's google_pagerank function Change Log: 2008-01-24 * Hash calculation functions updated because of miscalculation based on php versions. (algorithm updated based on a anonymous source code which supposed to be found at http://pagerank.gamesaga.net but not exists any more.) 2005-12-07 * Small bug removed (dies when caching disabled) 2005-11-24 * Added user-agent support * Class selects random google hostnames in order to prevent abuse. (You may define extra google hostnames) * Class now first tries cURL, fsockopen() and file_get_contents() to connect google servers. * Added caching option to class. Results now can be cached to flat files in order to prevent abuse and increase performance. * Cache files are stored in seperate directories for performance issues. 2005-11-04 * Initial version released Ex: $gpr = new GooglePR(); //$gpr->debug=true; //Uncomment this line to debug query process echo $gpr->GetPR("http://www.progen.com.tr"); //Uncomment following line to view debug results //echo "<pre>";print_r($gpr->debugResult);echo "</pre>"; **********************************************************************/ class GooglePR { //Public vars var $googleDomains = Array( "toolbarqueries.google.com", "www.google.com", "toolbarqueries.google.com.tr", "www.google.com.tr", "toolbarqueries.google.de", "www.google.de", "64.233.187.99", "72.14.207.99"); 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/1.0rn"; $request .= "Host: $hostrn"; $request .= "User-Agent: ".$this->userAgent."rn"; $request .= "Accept-Language: en-us, en;q=0.50rn"; $request .= "Accept-Charset: ISO-8859-1, utf-8;q=0.66, *;q=0.66rn"; $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=0.1rn"; $request .= "Connection: closern"; $request .= "Cache-Control: max-age=0rnrn"; stream_set_timeout ( $socket,10); fwrite( $socket, $request ); $ret = ''; while (!feof($socket)) { $ret .= fread($socket,4096); } fclose($socket); $contents = trim(substr($ret,strpos($ret,"rnrn") + 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; } } ?> |
Дата публикации: 2008-12-07
Прочитано: 4213 раз
