Usage: * * $akismet = new Akismet('http://www.example.com/blog/', 'aoeu1aoue'); * $akismet->setCommentAuthor($name); * $akismet->setCommentAuthorEmail($email); * $akismet->setCommentAuthorURL($url); * $akismet->setCommentContent($comment); * $akismet->setPermalink('http://www.example.com/blog/alex/someurl/'); * if($akismet->isCommentSpam()) * // store the comment but mark it as spam (in case of a mis-diagnosis) * else * // store the comment normally * * * @version 0.2 * @author Alex Potsides * @link http://www.achingbrain.net/ * @package cms * @subpackage comments */ class Akismet { private $version = '0.2'; private $wordPressAPIKey; private $blogURL; private $comment; private $apiPort; private $akismetServer; private $akismetVersion; // This prevents some potentially sensitive information from being sent accross the wire. private $ignore = array('HTTP_COOKIE', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED_HOST', 'HTTP_MAX_FORWARDS', 'HTTP_X_FORWARDED_SERVER', 'REDIRECT_STATUS', 'SERVER_PORT', 'PATH', 'DOCUMENT_ROOT', 'SERVER_ADMIN', 'QUERY_STRING', 'PHP_SELF' ); /** * @throws Exception An exception is thrown if your API key is invalid. * @param string Your WordPress API key. * @param string $blogURL The URL of your blog. */ public function __construct($blogURL, $wordPressAPIKey) { $this->blogURL = $blogURL; $this->wordPressAPIKey = $wordPressAPIKey; // Set some default values $this->apiPort = 80; $this->akismetServer = 'rest.akismet.com'; $this->akismetVersion = '1.1'; // Start to populate the comment data $this->comment['blog'] = $blogURL; $this->comment['user_agent'] = $_SERVER['HTTP_USER_AGENT']; $this->comment['referrer'] = $_SERVER['HTTP_REFERER']; // This is necessary if the server PHP5 is running on has been set up to run PHP4 and // PHP5 concurently and is actually running through a separate proxy al a these instructions: // http://www.schlitt.info/applications/blog/archives/83_How_to_run_PHP4_and_PHP_5_parallel.html // and http://wiki.coggeshall.org/37.html // Otherwise the user_ip appears as the IP address of the PHP4 server passing the requests to the // PHP5 one... $this->comment['user_ip'] = $_SERVER['REMOTE_ADDR'] != getenv('SERVER_ADDR') ? $_SERVER['REMOTE_ADDR'] : getenv('HTTP_X_FORWARDED_FOR'); // Check to see if the key is valid $response = $this->http_post('key=' . $this->wordPressAPIKey . '&blog=' . $this->blogURL, $this->akismetServer, '/' . $this->akismetVersion . '/verify-key'); if($response[1] != 'valid') { // Whoops, no it's not. Throw an exception as we can't proceed without a valid API key. throw new Exception('Invalid API key. Please obtain one from http://wordpress.com/api-keys/'); } } private function http_post($request, $host, $path) { $http_request = "POST " . $path . " HTTP/1.1\r\n"; $http_request .= "Host: " . $host . "\r\n"; $http_request .= "Content-Type: application/x-www-form-urlencoded; charset=utf-8\r\n"; $http_request .= "Content-Length: " . strlen($request) . "\r\n"; $http_request .= "User-Agent: Akismet PHP5 Class " . $this->version . " | Akismet/1.11\r\n"; $http_request .= "\r\n"; $http_request .= $request; $socketWriteRead = new SocketWriteRead($host, $this->apiPort, $http_request); $socketWriteRead->send(); return explode("\r\n\r\n", $socketWriteRead->getResponse(), 2); } // Formats the data for transmission echo $sql; private function getQueryString() { foreach($_SERVER as $key => $value) { if(!in_array($key, $this->ignore)) { if($key == 'REMOTE_ADDR') { $this->comment[$key] = $this->comment['user_ip']; } else { $this->comment[$key] = $value; } } } $query_string = ''; foreach($this->comment as $key => $data) { @$query_string .= $key . '=' . urlencode(stripslashes($data)) . '&'; } return $query_string; } /** * Tests for spam. * * Uses the web service provided by {@link http://www.akismet.com Akismet} to see whether or not the submitted comment is spam. Returns a boolean value. * * @return bool True if the comment is spam, false if not */ public function isCommentSpam() { $response = $this->http_post($this->getQueryString(), $this->wordPressAPIKey . '.rest.akismet.com', '/' . $this->akismetVersion . '/comment-check'); return ($response[1] == 'true'); } /** * Submit spam that is incorrectly tagged as ham. * * Using this function will make you a good citizen as it helps Akismet to learn from its mistakes. This will improve the service for everybody. */ public function submitSpam() { $this->http_post($this->getQueryString(), $this->wordPressAPIKey . '.' . $this->akismetServer, '/' . $this->akismetVersion . '/submit-spam'); } /** * Submit ham that is incorrectly tagged as spam. * * Using this function will make you a good citizen as it helps Akismet to learn from its mistakes. This will improve the service for everybody. */ public function submitHam() { $this->http_post($this->getQueryString(), $this->wordPressAPIKey . '.' . $this->akismetServer, '/' . $this->akismetVersion . '/submit-ham'); } /** * To override the user IP address when submitting spam/ham later on * * @param string $userip An IP address. Optional. */ public function setUserIP($userip) { $this->comment['user_ip'] = $userip; } /** * To override the referring page when submitting spam/ham later on * * @param string $referrer The referring page. Optional. */ public function setReferrer($referrer) { $this->comment['referrer'] = $referrer; } /** * A permanent URL referencing the blog post the comment was submitted to. * * @param string $permalink The URL. Optional. */ public function setPermalink($permalink) { $this->comment['permalink'] = $permalink; } /** * The type of comment being submitted. * * May be blank, comment, trackback, pingback, or a made up value like "registration" or "wiki". */ public function setCommentType($commentType) { $this->comment['comment_type'] = $commentType; } /** * The name that the author submitted with the comment. */ public function setCommentAuthor($commentAuthor) { $this->comment['comment_author'] = $commentAuthor; } /** * The email address that the author submitted with the comment. * * The address is assumed to be valid. */ public function setCommentAuthorEmail($authorEmail) { $this->comment['comment_author_email'] = $authorEmail; } /** * The URL that the author submitted with the comment. */ public function setCommentAuthorURL($authorURL) { $this->comment['comment_author_url'] = $authorURL; } /** * The comment's body text. */ public function setCommentContent($commentBody) { $this->comment['comment_content'] = $commentBody; } /** * Defaults to 80 */ public function setAPIPort($apiPort) { $this->apiPort = $apiPort; } /** * Defaults to rest.akismet.com */ public function setAkismetServer($akismetServer) { $this->akismetServer = $akismetServer; } /** * Defaults to '1.1' */ public function setAkismetVersion($akismetVersion) { $this->akismetVersion = $akismetVersion; } } /** * Utility class used by Akismet * * This class is used by Akismet to do the actual sending and receiving of data. It opens a connection to a remote host, sends some data and the reads the response and makes it available to the calling program. * * The code that makes up this class originates in the Akismet WordPress plugin, which is {@link http://akismet.com/download/ available on the Akismet website}. * * N.B. It is not necessary to call this class directly to use the Akismet class. This is included here mainly out of a sense of completeness. * * @name SocketWriteRead * @version 0.1 * @author Alex Potsides * @link http://www.achingbrain.net/ * @package cms * @subpackage comments */ class SocketWriteRead { private $host; private $port; private $request; private $response; private $responseLength; private $errorNumber; private $errorString; /** * @param string $host The host to send/receive data. * @param int $port The port on the remote host. * @param string $request The data to send. * @param int $responseLength The amount of data to read. Defaults to 1160 bytes. */ public function __construct($host, $port, $request, $responseLength = 1160) { $this->host = $host; $this->port = $port; $this->request = $request; $this->responseLength = $responseLength; $this->errorNumber = 0; $this->errorString = ''; } /** * Sends the data to the remote host. * * @throws An exception is thrown if a connection cannot be made to the remote host. */ public function send() { $this->response = ''; $fs = fsockopen($this->host, $this->port, $this->errorNumber, $this->errorString, 3); if($this->errorNumber != 0) { throw new Exception('Error connecting to host: ' . $this->host . ' Error number: ' . $this->errorNumber . ' Error message: ' . $this->errorString); } if($fs !== false) { @fwrite($fs, $this->request); while(!feof($fs)) { $this->response .= fgets($fs, $this->responseLength); } fclose($fs); } } /** * Returns the server response text * * @return string */ public function getResponse() { return $this->response; } /** * Returns the error number * * If there was no error, 0 will be returned. * * @return int */ public function getErrorNumner() { return $this->errorNumber; } /** * Returns the error string * * If there was no error, an empty string will be returned. * * @return string */ public function getErrorString() { return $this->errorString; } } ?>