wp-admin/includes/update.php:199Undismisses core update.
$versionstring$localestringboolfunction undismiss_core_update( $version, $locale ) { $dismissed = get_site_option( 'dismissed_update_core' ); $key = $version . '|' . $locale; if ( ! isset( $dismissed[ $key ] ) ) { return false; } unset( $dismissed[ $key ] ); return update_site_option( 'dismissed_update_core', $dismissed );}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/update.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.