do_action( 'after_switch_theme', string $old_name, WP_Theme $old_theme )

Fires on the first WP load after a theme switch if the old theme still exists.

Description

This action fires multiple times and the parameters differs according to the context, if the old theme exists or not. If the old theme is missing, the parameter will be the slug of the old theme.

Parameters

$old_name

(string) Old theme name.

$old_theme

(WP_Theme) WP_Theme instance of the old theme.

Source

File: wp-includes/theme.php

View on GitHub

Related

Used By

Used By
Used By Description
wp-includes/theme.php: check_theme_switched()

Checks if a theme has been changed and runs ‘after_switch_theme’ hook on the next WP load.

Changelog

Changelog
Version Description
WP-3.3.0 Introduced.