if (strpos($gb_request_uri, gb::$categories_prefix) === 0) {
# category(ies)
$categories = array_map('urldecode', explode(',', substr($gb_request_uri, strlen(gb::$categories_prefix))));
$postspage = GBExposedContent::findByCategories($categories, isset($_REQUEST['page']) ? intval($_REQUEST['page']) : 0);
gb::$is_categories = true;
gb::$is_404 = $postspage === false;
} elseif (strpos($gb_request_uri, gb::$tags_prefix) === 0) {
# tag(s)
$tags = array_map('urldecode', explode(',', substr($gb_request_uri, strlen(gb::$tags_prefix))));
$postspage = GBExposedContent::findByTags($tags, isset($_REQUEST['page']) ? intval($_REQUEST['page']) : 0);
gb::$is_tags = true;
gb::$is_404 = $postspage === false;
} elseif (strpos($gb_request_uri, gb::$feed_prefix) === 0) {
# feed
$postspage = GBPost::pageByPageno(0);
gb::$is_feed = true;
gb::event('will-handle-request');
# if we got this far it means no event observers took over this task, so
# we run the built-in feed (Atom) code:
require gb::$dir . '/helpers/feed.php';
exit;
} elseif (gb::$posts_prefix === '' || ($strptime = strptime($gb_request_uri, gb::$posts_prefix)) !== false) {
# post
if ($preview_pathspec !== null) {
$post = GBPost::findByName($preview_pathspec, $version);
} else {
$post = GBPost::find(urldecode($gb_request_uri), $version, $strptime);
}
if ($post === false) {
gb::$is_404 = true;
} else {
