Same name and namespace in other branches
  1. 8.9.x core/modules/history/history.module \HISTORY_READ_LIMIT
  2. 9 core/modules/history/history.module \HISTORY_READ_LIMIT

Entities changed before this time are always shown as read.

Entities changed within this time may be marked as new, updated, or read, depending on their state for the current user. Defaults to 30 days ago.

@todo Remove when https://www.drupal.org/node/2006632 lands.

7 uses of HISTORY_READ_LIMIT
CommentManager::getCountNewComments in core/modules/comment/src/CommentManager.php
Returns the number of new comments available on a given entity for a user.
ForumManager::lastVisit in core/modules/forum/src/ForumManager.php
Gets the last time the user viewed a node.
ForumManager::unreadTopics in core/modules/forum/src/ForumManager.php
HistoryUserTimestamp::render in core/modules/history/src/Plugin/views/field/HistoryUserTimestamp.php
history_cron in core/modules/history/history.module
Implements hook_cron().

... See full list

File

core/modules/history/history.module, line 25
Records which users have read which content.

Code

define('HISTORY_READ_LIMIT', (int) $_SERVER['REQUEST_TIME'] - 30 * 24 * 60 * 60);