load-page.php WordPress Action Hook
The load-page.php hook is one of the most important hooks in WordPress. It is called when a page is loaded. This hook can be used to load data from a database or file, or to initialize data for the page.
do_action( 'load-page.php' ) #
Contents
More Information
Runs when an administration menu page is loaded. This action is not usually added directly — see Administration Menus for more details of how to add admin menus. If you do want to use it directly, the return value from add_options_page and similar functions gives you the (page) part of the action name.
Source
File: wp-admin/admin.php