WordPress at a glance
action is not described

submitpage_box action-hook . WP 2.5.0

Fires before meta boxes with 'side' context are output for the 'page' post type.

The submitpage box is a meta box with 'side' context, so this hook fires just before it is output.

Usage

add_action( 'submitpage_box', 'action_function_name_5582' );
function action_function_name_5582( $post ){
	// action...
}
$post(WP_Post)
Post object.

Where the hook is called

In file: /wp-admin/edit-form-advanced.php
submitpage_box
wp-admin/edit-form-advanced.php 557
do_action( 'submitpage_box', $post );

Where the hook is used (in WP core)

Does not used.