wp-admin/update-core.php:966Undismiss a core update.
function do_undismiss_core_update() { $version = $_POST['version'] ?? false; $locale = $_POST['locale'] ?? 'en_US'; $update = find_core_update( $version, $locale ); if ( ! $update ) { return; } undismiss_core_update( $version, $locale ); wp_redirect( wp_nonce_url( 'update-core.php?action=upgrade-core', 'upgrade-core' ) ); exit;}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/update-core.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.