wp-admin/includes/deprecated.php:1115Gets the default page information to use.
WP_Postfunction get_default_page_to_edit() { _deprecated_function( __FUNCTION__, '3.5.0', "get_default_post_to_edit( 'page' )" ); $page = get_default_post_to_edit(); $page->post_type = 'page'; return $page;}Introduced in 2.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.