wp-admin/includes/screen.php:224Get the current screen object
WP_Screen|nullfunction get_current_screen() { global $current_screen; if ( ! isset( $current_screen ) ) { return null; } return $current_screen;}Introduced in 3.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/screen.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.