constant 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.

6 uses of HISTORY_READ_LIMIT
comment_num_new in drupal/core/modules/comment/comment.module
Gets the number of new comments for the current user and the specified node.
HistoryUserTimestamp::query in drupal/core/modules/history/lib/Drupal/history/Plugin/views/filter/HistoryUserTimestamp.php
Add this filter to the query.
HistoryUserTimestamp::render in drupal/core/modules/history/lib/Drupal/history/Plugin/views/field/HistoryUserTimestamp.php
Render the field.
NodeNewComments::pre_render in drupal/core/modules/comment/lib/Drupal/comment/Plugin/views/field/NodeNewComments.php
Run before any fields are rendered.
node_mark in drupal/core/modules/node/node.module
Determines the type of marker to be displayed for a given node.

... See full list

File

drupal/core/modules/history/history.module, line 20
Records which users have read which content.

Code

define('HISTORY_READ_LIMIT', REQUEST_TIME - 30 * 24 * 60 * 60);