方法一，给评论增加算术验证码
在主题目录的functions.php添加如下代码：
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//算术验证码by vfhky function spam_provent_math(){ $a=rand(5,15); $b=rand(5,15); echo "<input type='text' name='sum' id='sum' size='22' tabindex='3' value='动手又动脑，哦也 ！' onfocus='if (this.value != "") {this.value = "";}' onblur='if (this.value == "") {this.value = "动手又动脑，哦也 ！";}' /> = $a + $b （<font color='#0088DD'>防止机器人评论</font>）" ."<input type='hidden' name='a' value='$a'/>" ."<input type='hidden' name='b' value='$b'/>"; } function spam_provent_pre($spam_result){ $sum=$_POST['sum']; switch($sum){ case $_POST['a']+$_POST['b']:break; case null:wp_die('亲，算个结果撒');break; default:wp_die('算错啦⊙?⊙b汗'); } return $spam_result; } //注册用户or管理员则不需要验证 if(!is_user_logged_in() && $comment_data['comment_type']==''){ add_filter('preprocess_comment','spam_provent_pre'); } |
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（二）在主题目录下的comments.php(不同的主题可能评论框的位置不同，有的主题可能在functions.php里面)中调用上述代码：
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//根据是否是管理员来决定是否显示验证码 <?php if(!isset($_COOKIE['comment_author_email_'.COOKIEHASH]))spam_provent_math();?> |
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方法二，利用程序进行关键过滤
在你的主题下面的functions.php里面添加如下代码即可
后台查看垃圾评论
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| // 单独使用禁止全英文评论代码 function scp_comment_post( $incoming_comment ) { $pattern = '/[一-?]/u'; //验证是否为中文 if(!preg_match($pattern, $incoming_comment['comment_content'])) { wp_die( "You should type some Chinese word (like "你好") in your comment to pass the spam-check, thanks for your patience! 您的评论中必须包含中文!" ); } return( $incoming_comment ); } add_filter('preprocess_comment', 'scp_comment_post'); //综合使用< <小??>> Anti-Spam v1.84 by Willin Kan. class anti_spam { function anti_spam() { if ( !current_user_can('read') ) { add_action('template_redirect', array($this, 'w_tb'), 1); add_action('init', array($this, 'gate'), 1); add_action('preprocess_comment', array($this, 'sink'), 1); } } // ??谖?br /> function w_tb() { if ( is_singular() ) { // 非中文?系 if ( stripos($_SERVER['HTTP_ACCEPT_LANGUAGE'], 'zh') === false ) { add_filter( 'comments_open', create_function('', "return false;") ); // ???? } else { ob_start(create_function('$input','return preg_replace("#textarea(.*?)name=(["'])comment(["'])(.+)/textarea>#", "textarea$1name=$2w$3$4/textarea><textarea name="comment" cols="100%" rows="4" style="display:none">/textarea>",$input);') ); } } } // ?z查 function gate() { $w = 'w'; if ( !empty($_POST[$w]) && empty($_POST['comment']) ) { $_POST['comment'] = $_POST[$w]; } else { $request = $_SERVER['REQUEST_URI']; $referer = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '??'; $IP = isset($_SERVER["HTTP_X_FORWARDED_FOR"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] . ' (透?代理)' : $_SERVER["REMOTE_ADDR"]; $way = isset($_POST[$w]) ? '手?硬僮?' : '未???表格'; $spamcom = isset($_POST['comment']) ? $_POST['comment'] : ''; $_POST['spam_confirmed'] = "?求: ". $request. "n?砺? ". $referer. "nIP: ". $IP. "n方式: ". $way. "n?热? ". $spamcom. "n -- ??成功 --"; } } // ?理 function sink( $comment ) { // 不管 Trackbacks/Pingbacks if ( in_array( $comment['comment_type'], array('pingback', 'trackback') ) ) return $comment; // 已?定? spam if ( !empty($_POST['spam_confirmed']) ) { // 方法一: 直接?醯? ? die(); 前面?尚本??h除即可. //die(); // 方法二: ?擞?? spam, 留在?料??z查是否?判. add_filter('pre_comment_approved', create_function('', 'return "spam";')); $comment['comment_content'] = "[ 小??判?噙@是Spam! ]n". $_POST['spam_confirmed']; $this->add_black( $comment ); } else { // ?z查?像 $f = md5( strtolower($comment['comment_author_email']) ); $g = sprintf( "http://%d.gravatar.com", (hexdec($f{0}) % 2) ) .'/avatar/'. $f .'?d=404'; $headers = @get_headers( $g ); if ( !preg_match("|200|", $headers[0]) ) { // ?]?像的列入待??(即当第一次留言时，需要审核) add_filter('pre_comment_approved', create_function('', 'return "0";')); //$this->add_black( $comment ); } } return $comment; } // 列入黑名??br /> function add_black( $comment ) { if (!($comment_author_url = $comment['comment_author_url'])) return; if ($pos = strpos($comment_author_url, '//')) $comment_author_url = substr($comment_author_url, $pos + 2); if ($pos = strpos($comment_author_url, '/')) $comment_author_url = substr($comment_author_url, 0, $pos); $comment_author_url = strtr($comment_author_url, array('www.' => '')); if (!wp_blacklist_check('', '', $comment_author_url, '', '', '')) update_option('blacklist_keys', $comment_author_url . "n" . get_option('blacklist_keys')); } } $anti_spam = new anti_spam(); // -- END ---------------------------------------- |
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最后记得把代码$2w$3$4中间的w和$w = 'w'的w改成其它英文字母(但是二者要一致)，比如$2wc$3和$w = 'wc'等等，千万不要让spam发现额^^
时间： 2024-08-01 01:51:12