"; } /** * Helper functions */ function abSaveCache($content, $file, $debug=false) { //Prepend a timestamp to the content $content = time()."|".$content; echo ($debug) ? "
-
/** * AutomaticBackLinks.com - PHP linking code * Copy and paste this code in your php document where you want your links to display * Make sure that this code is inside PHP tags */ error_reporting(1); //Settings $abCacheFolderName = "automaticbacklinks_cache"; $abAccountCode = "3f253797e0e0906091c0b8d4aa05099a"; $abCacheHours = "24"; /** * Do not change anything below * Do not change anything below * Do not change anything below * Do not change anything below * Do not change anything below */ $v = "2.4"; $s = "php"; $abMsg = array(); if (trim($_GET['ab_debug']) == '3f253797e0e0906091c0b8d4aa05099a') { $debug = true; echo "
- Version: ".$v; echo "
- System: ".$s; unset($_GET['ab_debug']); } //Create cache folder if it does not exist $cacheFolder = abGetCacheFolder($abCacheFolderName, $debug); if ($cacheFolder) { //Current URL $page = abGetPageUrl($debug); if (abIsValidUrl($page, $debug)) { $cacheFileName = $cacheFolder."/".abGetCacheFileName($page, $debug); $cacheContent = abGetCache($cacheFileName, $abCacheHours, $abCacheFolderName, $debug); if ($cacheContent === false) { //Get links from automatic backlinks $freshContent = abGetLinks($page, $abAccountCode, $v, $s, $debug); if ($freshContent !== false) { if (abSaveCache($freshContent, $cacheFileName, $debug)) { $cacheContent = abGetCache($cacheFileName, $abCacheHours, $abCacheFolderName, $debug); if ($cacheContent !== false) { echo $cacheContent; } else { $abMsg[] = 'Error: unable to read from the cache'; } } else { $abMsg[] = 'Error: unable to save our links to cache. Please make sure that the folder '.$abCacheFolderName.' located in the folder '.$_SERVER['DOCUMENT_ROOT'].' and has CHMOD 0777'; } } else { $abMsg[] = 'Error: unable to get links from server. Please make sure that your site supports either file_get_contents() or the cURL library.'; } } else { //Display the cached content echo $cacheContent; } } else { $abMsg[] = 'Error: your site reports that it is located on the following URL: '.$page.' - This is not a valid URL and we can not display links on this page. This is probably due to an incorrect setting of the $_SERVER variable.'; } } else { $abMsg[] = 'Error: Unable to create or read from your link cache folder. Please try to create a folder by the name "'.$abCacheFolderName.'" directly in the root of your site and CHMOD the folder to 0777'; } foreach ($abMsg as $error) { echo $error."
"; } /** * Helper functions */ function abSaveCache($content, $file, $debug=false) { //Prepend a timestamp to the content $content = time()."|".$content; echo ($debug) ? "- Saving Cache: ".$content : ""; $fh = fopen($file, 'w'); if ($fh !== false) { if (!fwrite($fh, $content)) { echo ($debug) ? "
- Error Saving Cache!" : ""; return false; } } else { echo ($debug) ? "
- Error opening cache file for writing!" : ""; return false; } if (!fclose($fh)) { echo ($debug) ? "
- Error closing file handle!" : ""; return false; } if (!file_exists($file)) { echo ($debug) ? "
- Error could not create cache file!" : ""; return false; } else { echo ($debug) ? "
- Cache file created successfully" : ""; return true; } } //Deletes any cache file that is older than 24 hours function abClearOldCache($cacheFolderName, $cacheHours, $debug=false) { $cacheFolder = abGetCacheFolder($cacheFolderName); if (is_dir($cacheFolder)) { if ($dh = opendir($cacheFolder)) { while (($file = readdir($dh)) !== false) { if (strpos($file, ".cache")) { $modified = filemtime($cacheFolder."/".$file); $timeCutOff = time()-(60*60*$cacheHours); if ($modified < $timeCutOff) { @unlink($cacheFolder."/".$file); } } } closedir($dh); } } } //Returns the full path to the cache folder and also creates it if it does not work function abGetCacheFolder($cacheFolderName, $debug=false) { if (isset($_SERVER['DOCUMENT_ROOT'])) { $docRoot = rtrim($_SERVER['DOCUMENT_ROOT'],"/"); //Remove any trailing slashes } else if (isset($_SERVER['PATH_TRANSLATED'])) { $docRoot = rtrim(substr($_SERVER['PATH_TRANSLATED'], 0, 0 - strlen($_SERVER['PHP_SELF'])), '\\'); $docRoot = str_replace('\\\\', '/', $docRoot); } else { echo ($debug) ? "
- Error: Could not construct cache path" : ""; } $cacheFolder = $docRoot."/".$cacheFolderName; echo ($debug) ? "
- Cache folder is: ".$cacheFolder : ""; if (!file_exists($cacheFolder)) { echo ($debug) ? "
- Cache folder does not exist: ".$cacheFolder : ""; if (!@mkdir($cacheFolder,0777)) { echo ($debug) ? "
- Error - could not create cache folder: ".$cacheFolder : ""; return false; } else { echo ($debug) ? "
- Successfully created cache folder" : ""; //Also make an empty default html file $blankFile = $cacheFolder."/index.html"; if (!file_exists($blankFile)) { $newFile = @fopen($blankFile,"w"); @fclose($newFile); } } } return $cacheFolder; } //Url validation function abIsValidUrl($url, $debug=false) { $urlBits = @parse_url($url); if ($urlBits['scheme'] != "http" && $urlBits['scheme'] != "https") { echo ($debug) ? "
- Error! URL does not start with http: ".$url : ""; return false; } else if (strlen($urlBits['host']) < 4 || strpos($urlBits['host'], ".") === false) { echo ($debug) ? "
- Error! URL is incorrect: ".$url : ""; return false; } return true; } //Get the name of the cache file name function abGetCacheFileName($url, $debug=false) { $cacheFileName = md5($url).".cache"; echo ($debug) ? "
- Cache file name for URL: ".$url." is ".$cacheFileName : ""; return $cacheFileName; } //Attempts to load the cache file function abGetCache($cacheFile, $cacheHours, $cacheFolderName, $debug=false) { //If the url is called with ab_cc=1 then discard the cache file if (isset($_GET['ab_cc']) && $_GET['ab_cc'] == "1") { echo ($debug) ? "
- Clear cache invoked!" : ""; abRemoveCacheFile($cacheFile); unset($_GET['ab_cc']); return false; } if (!file_exists($cacheFile)) { echo ($debug) ? "
- Error! Cache file does not exist! ".$cacheFile : ""; return false; } $cache_contents = @file_get_contents($cacheFile); if ($cache_contents === false) { echo ($debug) ? "
- Error: Cache file is completely empty!" : ""; return false; } else { echo ($debug) ? "
- Cache file contents".$cache_contents : ""; //Separate the time out $arr
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