fix(bookmarks): unable to save bookmark on PHP 8

fixes #13637

mod/bookmarks/actions/bookmarks/save.php

@@ -6,36 +6,37 @@
 $title = elgg_get_title_input();
 $description = get_input('description');
 $address = get_input('address');
-$access_id = get_input('access_id');
+$access_id = (int) get_input('access_id');
 $tags = get_input('tags');
-$guid = get_input('guid');
+$guid = (int) get_input('guid');
 $container_guid = (int) get_input('container_guid', elgg_get_logged_in_user_guid());
 
 elgg_make_sticky_form('bookmarks');
 
 // don't use elgg_normalize_url() because we don't want
 // relative links resolved to this site.
 if ($address && !preg_match("#^((ht|f)tps?:)?//#i", $address)) {
-	$address = "http://$address";
+	$address = "http://{$address}";
 }
 
-if (!$title || !$address) {
+if (empty($title) || empty($address)) {
 	return elgg_error_response(elgg_echo('bookmarks:save:failed'));
 }
 
 if (!filter_var($address, FILTER_VALIDATE_URL)) {
 	return elgg_error_response(elgg_echo('bookmarks:save:failed'));
 }
 
-if ($guid == 0) {
+$new = true;
+if (empty($guid)) {
 	$bookmark = new ElggBookmark;
 	$bookmark->container_guid = $container_guid;
-	$new = true;
 } else {
 	$bookmark = get_entity($guid);
 	if (!$bookmark instanceof ElggBookmark || !$bookmark->canEdit()) {
 		return elgg_error_response(elgg_echo('bookmarks:save:failed'));
 	}
+	$new = false;
 }
 
 $bookmark->title = $title;
@@ -55,7 +56,7 @@
 	elgg_create_river_item([
 		'view' => 'river/object/bookmarks/create',
 		'action_type' => 'create',
-		'object_guid' => $bookmark->getGUID(),
+		'object_guid' => $bookmark->guid,
 	]);
 }