Anti-spam - Version 1.2

Version Description

  • 2012-10-28 =
  • minor changes
Download this release

Release Info

Developer webvitaly
Plugin Icon 128x128 Anti-spam
Version 1.2
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Version 1.2

Files changed (3) hide show
  1. anti-spam.php +118 -0
  2. js/anti-spam.js +11 -0
  3. readme.txt +70 -0
anti-spam.php ADDED
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+ <?php
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+ /*
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+ Plugin Name: Anti-spam
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+ Plugin URI: http://wordpress.org/extend/plugins/anti-spam/
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+ Description: No spam in comments. No captcha.
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+ Version: 1.2
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+ Author: webvitaly
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+ Author URI: http://web-profile.com.ua/wordpress/plugins/
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+ License: GPLv2 or later
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+ */
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+
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+ $antispam_unqprfx_send_spam_comment_to_admin = false; // if true, than rejected spam comments will be sent to admin email
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+
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+ $antispam_unqprfx_version = '1.2';
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+
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+
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+ function antispam_unqprfx_scripts_styles_init() {
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+ global $antispam_unqprfx_version;
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+ if ( !is_admin() ) { // && is_singular() && comments_open() && get_option( 'thread_comments' )
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+ //wp_enqueue_script('jquery');
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+ wp_enqueue_script( 'anti-spam-script', plugins_url( '/js/anti-spam.js', __FILE__ ), array('jquery'), $antispam_unqprfx_version );
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+ }
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+ }
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+ add_action('init', 'antispam_unqprfx_scripts_styles_init');
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+
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+
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+ function antispam_unqprfx_form_part() {
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+ $antispam_unqprfx_form_part = '
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+ <p class="comment-form-anti-spam" style="clear:both;">
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+ <label for="anti-spam">Current ye@r</label> <span class="required">*</span>
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+ <input type="hidden" name="anti-spam-0" id="anti-spam-0" value="'.date('Y').'" />
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+ <input type="text" name="anti-spam" id="anti-spam" size="30" value="" />
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+ </p>
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+ '; // question (hidden with js) [aria-required="true" required="required"]
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+ $antispam_unqprfx_form_part .= '
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+ <p class="comment-form-anti-spam-2" style="display:none;">
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+ <label for="anti-spam-2">Leave this field empty</label> <span class="required">*</span>
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+ <input type="text" name="anti-spam-2" id="anti-spam-2" size="30" value=""/>
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+ </p>
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+ '; // empty field (hidden with css)
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+ echo $antispam_unqprfx_form_part;
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+ }
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+ add_action( 'comment_form', 'antispam_unqprfx_form_part' ); // add anti-spam input to the comment form
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+
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+
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+ function antispam_unqprfx_check_comment( $commentdata ) {
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+ global $antispam_unqprfx_send_spam_comment_to_admin;
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+ extract( $commentdata );
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+ $antispam_unqprfx_pre_error_message = '<strong><a href="javascript:window.history.back()">Go back</a></strong> and try again.';
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+ $antispam_unqprfx_error_message = '';
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+ if( !is_user_logged_in() && $comment_type != 'pingback' && $comment_type != 'trackback' /* && !current_user_can( 'publish_posts' ) */ ) { // logged in user is not a spammer
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+ $error_flag = false;
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+
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+ if ( trim( $_POST['anti-spam'] ) != date('Y') ) { // answer is wrong - maybe spam
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+ $error_flag = true;
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+ if ( empty( $_POST['anti-spam'] ) ) { // empty answer - maybe spam
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+ $antispam_unqprfx_error_message .= '<br> Error: empty answer. ';
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+ }else{
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+ $antispam_unqprfx_error_message .= '<br> Error: answer is wrong. ';
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+ }
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+ }
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+ if ( !empty( $_POST['anti-spam-2'] ) ) { // field is not empty - maybe spam
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+ $error_flag = true;
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+ $antispam_unqprfx_error_message .= '<br> Error: field should be empty. ';
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+ }
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+ if( $error_flag ){ // if we have an error
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+ if ( $antispam_unqprfx_send_spam_comment_to_admin ) { // if sending email to admin is enabled
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+ $post = get_post($comment->comment_post_ID);
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+
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+ $antispam_unqprfx_admin_email = get_option('admin_email'); // admin email
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+ $antispam_unqprfx_subject = 'Spam comment on site "'.get_bloginfo('name').'" '; // email subject
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+ $antispam_unqprfx_message = 'Spam comment on "'.$post->post_title.'"' . "\r\n";
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+ $antispam_unqprfx_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
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+
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+ $antispam_unqprfx_message .= 'IP : ' . $_SERVER['REMOTE_ADDR'] . "\r\n";
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+ $antispam_unqprfx_message .= 'User agent : ' . $_SERVER['HTTP_USER_AGENT'] . "\r\n";
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+ $antispam_unqprfx_message .= 'Referer : ' . $_SERVER['HTTP_REFERER'] . "\r\n\r\n";
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+
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+ $antispam_unqprfx_message .= 'Errors: ' . $antispam_unqprfx_error_message . "\r\n\r\n";
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+
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+ $antispam_unqprfx_message .= 'Post vars:'."\r\n"; // lets see what post vars spammers try to submit
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+ foreach ($_POST as $key => $value) {
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+ $antispam_unqprfx_message .= '$_POST['.$key. '] = '.$value."\r\n"; // .chr(13).chr(10)
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+ }
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+ $antispam_unqprfx_message .= "\r\n\r\n";
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+
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+ $antispam_unqprfx_message .= 'Cookie vars:'."\r\n"; // lets see what cookie vars spammers try to submit
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+ foreach ($_COOKIE as $key => $value) {
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+ $antispam_unqprfx_message .= '$_COOKIE['.$key. '] = '.$value."\r\n"; // .chr(13).chr(10)
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+ }
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+ $antispam_unqprfx_message .= "\r\n\r\n";
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+
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+ $antispam_unqprfx_message .= '-----------------------------'."\r\n";
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+ $antispam_unqprfx_message .= 'This is spam comment rejected by Anti-spam plugin. wordpress.org/extend/plugins/anti-spam/' . "\r\n";
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+ $antispam_unqprfx_message .= 'You may edit "anti-spam.php" file and disable this notification.' . "\r\n";
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+ $antispam_unqprfx_message .= 'You should find "$antispam_unqprfx_send_spam_comment_to_admin" and make it equal to "false".' . "\r\n";
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+
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+ @wp_mail( $antispam_unqprfx_admin_email, $antispam_unqprfx_subject, $antispam_unqprfx_message ); // send comment to admin email
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+ }
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+ wp_die( $antispam_unqprfx_pre_error_message . $antispam_unqprfx_error_message ); // die and show errors
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+ }
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+ }
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+ return $commentdata;
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+ }
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+
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+ if( ! is_admin() ) {
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+ add_filter( 'preprocess_comment', 'antispam_unqprfx_check_comment', 1 );
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+ }
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+
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+
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+ function antispam_unqprfx_plugin_meta( $links, $file ) { // add 'Plugin page' and 'Donate' links to plugin meta row
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+ if ( strpos( $file, 'anti-spam.php' ) !== false ) {
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+ $links = array_merge( $links, array( '<a href="http://web-profile.com.ua/wordpress/plugins/anti-spam/" title="Plugin page">' . __('Anti-spam') . '</a>' ) );
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+ $links = array_merge( $links, array( '<a href="http://web-profile.com.ua/donate/" title="Support the development">' . __('Donate') . '</a>' ) );
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+ }
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+ return $links;
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+ }
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+ add_filter( 'plugin_row_meta', 'antispam_unqprfx_plugin_meta', 10, 2 );
js/anti-spam.js ADDED
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+ /*
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+ Anti-spam plugin
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+ No spam in comments. No captcha.
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+ wordpress.org/extend/plugins/anti-spam/
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+ */
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+
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+ jQuery(function($){
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+ $('.comment-form-anti-spam, .comment-form-anti-spam-2').hide(); // hide inputs from users
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+ var answer = $('.comment-form-anti-spam input#anti-spam-0').val(); // get answer
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+ $('.comment-form-anti-spam input#anti-spam').val( answer ); // set answer into other input
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+ });
readme.txt ADDED
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+ === Anti-spam ===
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+ Contributors: webvitaly
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+ Donate link: http://web-profile.com.ua/donate/
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+ Tags: spam, spammer, spammers, comment, comments, antispam, anti-spam, block-spam, spamfree, spam-free, spambot, spam-bot, bot
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+ Requires at least: 3.0
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+ Tested up to: 3.5.1
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+ Stable tag: 1.2
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+ License: GPLv2 or later
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+ License URI: http://www.gnu.org/licenses/gpl-2.0.html
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+
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+ No spam in comments. No captcha.
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+
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+ == Description ==
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+
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+ [Anti-spam](http://web-profile.com.ua/wordpress/plugins/anti-spam/ "Plugin page") |
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+ [Donate](http://web-profile.com.ua/donate/ "Support the development")
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+
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+ Anti-spam plugin blocks spam in comments automatically, invisibly for users and for admins.
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+
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+ * **no captcha**, because spam is not users' problem
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+ * **no moderation queues**, because spam is not administrators' problem
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+ * **no options**, because it is great to forget about spam completely
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+
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+ Plugin is easy to use: just install it and it just works.
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+ Need [more info about the plugin](http://wordpress.org/extend/plugins/anti-spam/faq/)?
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+
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+ = Useful plugins: =
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+ * ["Page-list" - show list of pages with shortcodes](http://wordpress.org/extend/plugins/page-list/ "list of pages with shortcodes")
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+ * ["Iframe" - embed iframe with shortcode](http://wordpress.org/extend/plugins/iframe/ "embed iframe")
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+ * ["Filenames to latin" - sanitize filenames to latin during upload](http://wordpress.org/extend/plugins/filenames-to-latin/ "sanitize filenames to latin")
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+
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+ == Installation ==
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+
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+ 1. install and activate the plugin on the Plugins page
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+ 2. enjoy life without spam in comments
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+
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+ == Frequently Asked Questions ==
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+
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+ = How does Anti-spam plugin work? =
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+
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+ Two extra hidden fields are added to comments form. First field is the question about the current year. Second field should be empty.
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+ If the user visits site, than first field is answered automatically with javascript, second field left blank and both fields are hidden by javascript and css and invisible for the user.
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+ If the spammer tries to submit comment form, he will make a mistake with answer on first field or tries to submit an empty field and spam comment will be automatically rejected.
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+
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+ = How to test what spam comments are rejected? =
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+
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+ You may enable sending all rejected spam comments to admin email.
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+ You should edit "anti-spam.php" file and find "$antispam_unqprfx_send_spam_comment_to_admin" and make it "true".
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+
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+ = What is the percentage of spam blocked? =
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+
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+ Anti-spam plugin blocks about 99.9% of automatic spam messages (sent by spam-bots via post requests).
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+ But Anti-spam plugin will pass the messages which were submitted by spammers manually via browser. But such messages happens very rarely.
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+
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+ = Not enough information about the plugin? =
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+
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+ You may check out the [source code of the plugin](http://plugins.trac.wordpress.org/browser/anti-spam/trunk/anti-spam.php).
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+ The plugin has about 100 lines of code and pretty easy to read. I was trying my best to make plugin's code clean.
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+ Plugin is small but it makes all the dirty work against spam pretty good. You may give it a try.
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+
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+ == Changelog ==
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+
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+ = 1.2 - 2012-10-28 =
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+ * minor changes
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+
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+ = 1.1 - 2012-10-14 =
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+ * sending answer from server to client into hidden field (because client year and server year could mismatch)
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+
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+ = 1.0 - 2012-09-06 =
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+ * initial release