68 lines
2.0 KiB
PHP
68 lines
2.0 KiB
PHP
<?php
|
|
/*
|
|
* Name: Comment Word Ban
|
|
* Author: Shish <webmaster@shishnet.org>
|
|
* License: GPLv2
|
|
* Description: For stopping spam and other comment abuse
|
|
* Documentation:
|
|
* Allows an administrator to ban certain words
|
|
* from comments. This can be a very simple but effective way
|
|
* of stopping spam; just add "viagra", "porn", etc to the
|
|
* banned words list.
|
|
* <p>Regex bans are also supported, allowing more complicated
|
|
* bans like <code>/http:.*\.cn\//</code> to block links to
|
|
* chinese websites, or <code>/.*?http.*?http.*?http.*?http.*?/</code>
|
|
* to block comments with four (or more) links in.
|
|
* <p>Note that for non-regex matches, only whole words are
|
|
* matched, eg banning "sex" would block the comment "get free
|
|
* sex call this number", but allow "This is a photo of Bob
|
|
* from Essex"
|
|
*/
|
|
|
|
class BanWords implements Extension {
|
|
public function receive_event(Event $event) {
|
|
if($event instanceof InitExtEvent) {
|
|
global $config;
|
|
$config->set_default_string('banned_words', "
|
|
viagra
|
|
porn
|
|
");
|
|
}
|
|
|
|
if($event instanceof CommentPostingEvent) {
|
|
global $config;
|
|
$banned = $config->get_string("banned_words");
|
|
$comment = strtolower($event->comment);
|
|
|
|
foreach(explode("\n", $banned) as $word) {
|
|
$word = trim(strtolower($word));
|
|
if(strlen($word) == 0) {
|
|
// line is blank
|
|
continue;
|
|
}
|
|
else if($word[0] == '/') {
|
|
// lines that start with slash are regex
|
|
if(preg_match($word, $comment)) {
|
|
throw new CommentPostingException("Comment contains banned terms");
|
|
}
|
|
}
|
|
else {
|
|
// other words are literal
|
|
if(strpos($comment, $word) !== false) {
|
|
throw new CommentPostingException("Comment contains banned terms");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if($event instanceof SetupBuildingEvent) {
|
|
$sb = new SetupBlock("Banned Phrases");
|
|
$sb->add_label("One per line, lines that start with slashes are treated as regex<br/>");
|
|
$sb->add_longtext_option("banned_words");
|
|
$event->panel->add_block($sb);
|
|
}
|
|
}
|
|
}
|
|
add_event_listener(new BanWords(), 30); // before the comment is added
|
|
?>
|