WordPress实现自动拒绝垃圾评论的方法

太阳不下山

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。

代码如下:

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');