WordPress at a glance
action is not described

after_mu_upgrade action-hook . WP MU

Fires after the Multisite DB upgrade for each site is complete.


add_action( 'after_mu_upgrade', 'action_function_name_9390' );
function action_function_name_9390( $response ){
	// action...
The upgrade response array or WP_Error on failure.


  • Since MU (3.0.0)

Where the hook is called

In file: /wp-admin/network/upgrade.php
wp-admin/network/upgrade.php 110
do_action( 'after_mu_upgrade', $response );
wp-admin/admin.php 84
do_action( 'after_mu_upgrade', $response );

Where the hook is used (in WP core)

Does not used.