// 垃圾評論攔截
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 ( !emptyempty($_POST['w']) && emptyempty($_POST['comment']) ) {
$_POST['comment'] = $_POST['w'];
} else {
$request = $_SERVER['REQUEST_URI'];
$referer = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '隱瞞';
$IP = isset($_SERVER["HTTP_X_FORWARDED_FOR"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] . ' (透過代理)' : $_SERVER["REMOTE_ADDR"];
$way = isset($_POST['w']) ? '手動操作' : '未經(jīng)評論表格';
$spamcom = isset($_POST['comment']) ? $_POST['comment'] : null;
$_POST['spam_confirmed'] = "請求: ". $request. "n來路: ". $referer. "nIP: ". $IP. "n方式: ". $way. "n?熱? ". $spamcom. "n -- 記錄成功 --";
}
}
function sink( $comment ) {
if ( !emptyempty($_POST['spam_confirmed']) ) {
if ( in_array( $comment['comment_type'], array('pingback', 'trackback') ) ) return $comment;
//方法一: 直接擋掉, ? die(); 前面兩斜線?h除即可.
die();
//方法二: 標(biāo)記為 spam, 留在資料庫檢查是否誤判.
//add_filter('pre_comment_approved', create_function('', 'return "spam";'));
//$comment['comment_content'] = "[ 小墻判斷這是 Spam! ]n". $_POST['spam_confirmed'];
}
return $comment;
}
}
$anti_spam = new anti_spam();

function in_comment_post_like($string, $array) {
foreach($array as $ref) { if(strstr($string, $ref)) { return true; } }
return false;
}
function drop_bad_comments() {
if (!emptyempty($_POST['comment'])) {
$post_comment_content = $_POST['comment'];
$lower_case_comment = strtolower($_POST['comment']);
$bad_comment_content = array(
'viagra',
'hydrocodone',
'hair loss',
'xanax',
'tramadol',
'russian girls',
'russian brides',
'lorazepam',
'adderall',
'dexadrine',
'no prescription',
'oxycontin',
'without a prescription',
'sex pics',
'family incest',
'online casinos',
'online dating',
'cialis',
'best forex',
'amoxicillin'
);
if (in_comment_post_like($lower_case_comment, $bad_comment_content)) {
$comment_box_text = wordwrap(trim($post_comment_content), 80, "n ", true);
$txtdrop = fopen('/var/log/httpd/wp_post-logger/nullamatix.com-text-area_dropped.txt', 'a');
fwrite($txtdrop, " --------------n [COMMENT] = " . $post_comment_content . "n --------------n");
fwrite($txtdrop, " [SOURCE_IP] = " . $_SERVER['REMOTE_ADDR'] . " @ " . date("F j, Y, g:i a") . "n");
fwrite($txtdrop, " [USERAGENT] = " . $_SERVER['HTTP_USER_AGENT'] . "n");
fwrite($txtdrop, " [REFERER ] = " . $_SERVER['HTTP_REFERER'] . "n");
fwrite($txtdrop, " [FILE_NAME] = " . $_SERVER['SCRIPT_NAME'] . " - [REQ_URI] = " . $_SERVER['REQUEST_URI'] . "n");
fwrite($txtdrop, '--------------**********------------------'."n");
header("HTTP/1.1 406 Not Acceptable");
header("Status: 406 Not Acceptable");
header("Connection: Close");
wp_die( __('bang bang.') );
}
}
}
add_action('init', 'drop_bad_comments');

function rkv_url_spamcheck( $approved , $commentdata ) {
return ( strlen( $commentdata['comment_author_url'] ) > 50 ) ? 'spam' : $approved;
}
add_filter( 'pre_comment_approved', 'rkv_url_spamcheck', 99, 2 );