wp_upgrade │ action-hook │ WP 3.9.0

Fires after a site is fully upgraded.

Usage

add_action( 'wp_upgrade', 'wp_kama_upgrade_action', 10, 2 );

/**
 * Function for `wp_upgrade` action-hook.
 * 
 * @param int $wp_db_version         The new $wp_db_version.
 * @param int $wp_current_db_version The old (current) $wp_db_version.
 *
 * @return void
 */
function wp_kama_upgrade_action( $wp_db_version, $wp_current_db_version ){

	// action...
}

$wp_db_version(int)

The new $wp_db_version.

$wp_current_db_version(int)

The old (current) $wp_db_version.

Changelog

Where the hook is called

do_action( 'wp_upgrade', $wp_db_version, $wp_current_db_version );

Where the hook is used in WordPress