WordPress代码将垃圾评论拒之门外

垃圾评论，如今可以说是无处不在，作为WordPress使用者的我们，防止垃圾评论的侵扰是必须要做的。之前倡萌介绍了WordPress防垃圾评论插件：Akismet，今天来介绍使用代码将垃圾评论拒之门外的方法，目前倡萌已经用了2年，效果非常棒！

此方法依旧是来自 Willin Kan 大师（可惜他已经退出WordPress圈），折腾很简单，直接将下面的代码放到主题的functions.php文件的最后一个 ?>前面即可：

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// 垃圾评论拦截
class anti_spam {
	function anti_spam() {
		if ( !current_user_can('level_0') ) {
			add_action('template_redirect', array($this, 'w_tb'), 1);
			add_action('init', array($this, 'gate'), 1);
			add_action('preprocess_comment', array($this, 'sink'), 1);
		}
	}
	function w_tb() {
		if ( is_singular() ) {
			ob_start(create_function('$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);') );
		}
	}
	function gate() {
		if ( !empty($_POST['w']) && empty($_POST['comment']) ) {
			$_POST['comment'] = $_POST['w'];
		} else {
			$request = $_SERVER['REQUEST_URI'];
			$referer = isset($_SERVER['HTTP_REFERER'])         ? $_SERVER['HTTP_REFERER']         : '隐瞒';
			$IP      = isset($_SERVER["HTTP_X_FORWARDED_FOR"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] . ' (透过代理)' : $_SERVER["REMOTE_ADDR"];
			$way     = isset($_POST['w'])                      ? '手动操作'                       : '未经评论表格';
			$spamcom = isset($_POST['comment'])                ? $_POST['comment']                : null;
			$_POST['spam_confirmed'] = "请求: ". $request. "\n来路: ". $referer. "\nIP: ". $IP. "\n方式: ". $way. "\n內容: ". $spamcom. "\n -- 记录成功 --";
		}
	}
	function sink( $comment ) {
		if ( !empty($_POST['spam_confirmed']) ) {
			if ( in_array( $comment['comment_type'], array('pingback', 'trackback') ) ) return $comment;
			//方法一: 直接挡掉, 將 die(); 前面两斜线刪除即可.
			die();
			//方法二: 标记为 spam, 留在资料库检查是否误判.
			//add_filter('pre_comment_approved', create_function('', 'return "spam";'));
			//$comment['comment_content'] = "[ 小墙判断这是 Spam! ]\n". $_POST['spam_confirmed'];
		}
		return $comment;
	}
}
$anti_spam = new anti_spam();

// 垃圾评论拦截 class anti_spam { function anti_spam() { if ( !current_user_can(‘level_0’) ) { add_action(‘template_redirect’, array($this, ‘w_tb’), 1); add_action(‘init’, array($this, ‘gate’), 1); add_action(‘preprocess_comment’, array($this, ‘sink’), 1); } } function w_tb() { if ( is_singular() ) { ob_start(create_function(‘$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);’) ); } } function gate() { if ( !empty($_POST[‘w’]) && empty($_POST[‘comment’]) ) { $_POST[‘comment’] = $_POST[‘w’]; } else { $request = $_SERVER[‘REQUEST_URI’]; $referer = isset($_SERVER[‘HTTP_REFERER’]) ? $_SERVER[‘HTTP_REFERER’] : ‘隐瞒’; $IP = isset($_SERVER[“HTTP_X_FORWARDED_FOR”]) ? $_SERVER[“HTTP_X_FORWARDED_FOR”] . ‘ (透过代理)’ : $_SERVER[“REMOTE_ADDR”]; $way = isset($_POST[‘w’]) ? ‘手动操作’ : ‘未经评论表格’; $spamcom = isset($_POST[‘comment’]) ? $_POST[‘comment’] : null; $_POST[‘spam_confirmed’] = “请求: “. $request. “\n来路: “. $referer. “\nIP: “. $IP. “\n方式: “. $way. “\n內容: “. $spamcom. “\n — 记录成功 –“; } } function sink( $comment ) { if ( !empty($_POST[‘spam_confirmed’]) ) { if ( in_array( $comment[‘comment_type’], array(‘pingback’, ‘trackback’) ) ) return $comment; //方法一: 直接挡掉, 將 die(); 前面两斜线刪除即可. die(); //方法二: 标记为 spam, 留在资料库检查是否误判. //add_filter(‘pre_comment_approved’, create_function(”, ‘return “spam”;’)); //$comment[‘comment_content’] = “[ 小墙判断这是 Spam! ]\n”. $_POST[‘spam_confirmed’]; } return $comment; } } $anti_spam = new anti_spam();

这个方法可以阻止98%以上的垃圾评论，当然了，倡萌还建议你审核第一次提交的评论人的评论，设置审核后才显示，如果遇到垃圾评论，将其email、IP、网址等添加到黑名单即可，下面是倡萌目前的评论设置。你可以在WP后台-设置-讨论下设置：