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@package MicroAkismet @author Gaby Vanhegan @version 1.2 @date 2007-01-29 A straightforward set of functions for talking to the Akismet blog-spam protection system. This is intended as a simple and compact method for adding Akismet protection to any user-submitted content. Built using the information and examples on the Akismet API page: http://akismet.com/development/api/ There are two versions, a bunch of static functions or a stand-alone class. Usage is practically identical for either, you can use whichever one you want. INSTALLATION: 1. To begin using the functions, download and unzip the script from the website: http://vanhegan.net/software/akismet/ 2. Place the php file you want somewhere in your web root, and load the functions or class using: include_once("func.microakismet.inc.php") Or: include_once("class.microakismet.inc.php") 3. Obtain a valid WordPress API key, if you do not already have one, from: http://wordpress.com/ If you don't have an account you will need to create one. Once you have an account, your API key can be found at the bottom of this page: http://wordpress.com/profile/ 4a. If you're using the static functions (func.microakismet.inc.php) then you will need to set the global variables at the top of the file; your WordPress API key and the home page of the blog being protected. The User Agent can be changed to suit your application. If it is not a blog that is being protected, change the home page to the comments page or forum page that is being protected. 4b. If you are using the class file (func.microakismet.inc.php), the API key, homepage and user agent are specified in the class constructor. USAGE: There are three functions for talking to Akismet. In the static functions: aksimet_check( $vars ) // Check if a comment is spam or not aksimet_spam( $vars ) // Re-classify a comment as spam aksimet_ham( $vars ) // Re-classify a comment as ham And the corresponding member functions in the class version: $akismet = new MicroAkismet( $api_key, $blog, $user_agent ); $akismet->check( $vars ); $akismet->spam( $vars ); $akismet->ham( $vars ); Each function takes one argument, $vars, which is a list of information about the comment that is being checked. $vars *must* contain at least this information: $vars["user_ip"] // The IP of the comment poster $vars["user_agent"] // The user-agent of the comment poster The "blog" value (the homepage of the blog that this post came from) is added automatically by the code. The following extra information can also be added, to help Akismet classify the message more accurately: $vars["referrer"] // The content of the HTTP_REFERER header $vars["permalink"] // Permalink to the comment $vars["comment_type"] // May be blank, comment, trackback, etc $vars["comment_author"] // Submitted name with the comment $vars["comment_author_email"] // Submitted email address $vars["comment_author_url"] // Commenter URL $vars["comment_content"] // The content that was submitted In PHP, you can also add the contents of the $_SERVER array to this list, which gives extra information to Akismet, and further increases the accuracy of their system: EXAMPLE: To check if a message is spam or not: <?php // The array of data we need $vars = array(); // Add the contents of the $_SERVER array, to help Akismet out foreach ( $_SERVER as $key => $val ) { $vars[ $key ] = $val; } // Mandatory fields of information $vars["user_ip"] = $_SERVER["REMOTE_ADDR"]; $vars["user_agent"] = $_SERVER["HTTP_USER_AGENT"]; // The body of the message to check, the name of the person who // posted it, and their email address $vars["comment_content"] = $_POST["comment"]; $vars["comment_author"] = $_POST["sender_name"]; $vars["comment_author_email"] = $_POST["sender_email"]; // ... Add more fields if you want // Check if it's spam if ( akismet_check( $vars ) ) { die( "The message was spam!" ); } else { // ... // Do whatever we do if the message was OK } ?> Or to do this using the class version: <?php // The array of data we need $vars = array(); // ... Add vars as before ... $akismet = new MicroAkismet( "your.wordpress.api.key", "http://homepaeg.com/blog/comments", "mysite.com/1.0" ); // Check if it's spam if ( $akismet->check( $vars ) ) { die( "The message was spam!" ); } else { // Do whatever we do if the message was OK } ?>