Gazelle/sections/collages/delete_comment.php

<?
include(SERVER_ROOT.'/classes/text.class.php'); // Text formatting class
$Text = new TEXT;

authorize();

// Quick SQL injection check
if (!$_GET['postid'] || !is_number($_GET['postid'])) {
	error(0);
}
$PostID = $_GET['postid'];

// Make sure they are moderators
if (!check_perms('site_moderate_forums')) {
	error(403);
}

// Get number of pages
// $Pages = number of pages in the thread
// $Page = which page the post is on
$DB->query("
	SELECT
		CollageID,
		CEIL(COUNT(ID) / " . TORRENT_COMMENTS_PER_PAGE . ") AS Pages,
		CEIL(SUM(IF(ID <= '$PostID', 1, 0)) / " . TORRENT_COMMENTS_PER_PAGE . ") AS Page
	FROM collages_comments
	WHERE CollageID = (
			SELECT CollageID
			FROM collages_comments
			WHERE ID = '$PostID'
		)
	GROUP BY CollageID");
list($CollageID, $Pages, $Page) = $DB->next_record();

$DB->query("
	DELETE FROM collages_comments
	WHERE ID = '$PostID'");

$Cache->delete_value("collage_$CollageID");
$Cache->increment_value("collage_comments_$CollageID", -1);

//We need to clear all subsequential catalogues as they've all been bumped with the absence of this post
$ThisCatalogue = floor((TORRENT_COMMENTS_PER_PAGE * $Page - TORRENT_COMMENTS_PER_PAGE) / THREAD_CATALOGUE);
$LastCatalogue = floor((TORRENT_COMMENTS_PER_PAGE * $Pages - TORRENT_COMMENTS_PER_PAGE) / THREAD_CATALOGUE);
for ($i = $ThisCatalogue; $i <= $LastCatalogue; $i++) {
	$Cache->delete_value("collage_comments_$CollageID"."_catalogue_$i");
}
?>