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

Fires on the next WP load after the theme has been switched.

Contents

Description

The parameters differ according to whether the old theme exists or not.
If the old theme is missing, the old name will instead be the slug of the old theme.

See ‘switch_theme’.

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Parameters

$old_name string
Old theme name.
$old_theme WP_Theme
WP_Theme instance of the old theme.

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More Information

Callback functions attached to this hook are only triggered in the theme (and/or child theme) being activated. To do things when your theme is deactivated, use switch_theme.

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Source

File: wp-includes/theme.php. View all references 

do_action( 'after_switch_theme', $old_theme->get( 'Name' ), $old_theme );

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Used By

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

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

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Changelog

Changelog
Version Description
3.3.0 Introduced.

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User Contributed Notes

  1. Skip to note 1 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note
    Contributed by Steven Lin —

    Example migrated from Codex:

    Add options for your theme and set them to their default values.

    add_action('after_switch_theme', 'mytheme_setup_options');

function mytheme_setup_options () {
  add_option('mytheme_enable_catalog', 0);
  add_option('mytheme_enable_features', 0);
}
  2. Skip to note 2 content
    You must log in to vote on the helpfulness of this noteVote results for this note: -1You must log in to vote on the helpfulness of this note
    Contributed by NateWr —

    Update the default medium image size when a theme is activated.

    function example_update_default_image_size( $old_theme_name, $old_theme = false ) {
	update_option( 'medium_size_w', 800 );
	update_option( 'medium_size_h', 400 );
}
add_action( 'after_switch_theme', 'example_update_default_image_size', 10, 2 );

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