wp-admin/includes/deprecated.php:1162This was once used to kick-off the Core Updater.
$current$feedbackoptional''function wp_update_core($current, $feedback = '') { _deprecated_function( __FUNCTION__, '3.7.0', 'new Core_Upgrader();' ); if ( !empty($feedback) ) add_filter('update_feedback', $feedback); require ABSPATH . 'wp-admin/includes/class-wp-upgrader.php'; $upgrader = new Core_Upgrader(); return $upgrader->upgrade($current); }Introduced in 2.7.0. 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.