很多WordPress站长都经常受到垃圾评论的滋扰，针对这种情况，采用下面的代码可能会对你有所帮助。
将以下代码加入到functions.php页面中。
使用时任何包含在$bad_comment_content数组内的字符，都将会被自动拒绝留言。
function in_comment_post_like($string, $array) {
foreach($array as $ref) { if(strstr($string, $ref)) { return true; } }
return false;
}
function drop_bad_comments() {
if (!empty($_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');
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