switch_theme( string $stylesheet )
Switches the theme.
Description
Accepts one argument: $stylesheet of the theme. It also accepts an additional function signature of two arguments: $template then $stylesheet. This is for backward compatibility.
Parameters
- $stylesheet
-
(Required) Stylesheet name
Source
File: wp-includes/theme.php
function switch_theme( $stylesheet ) {
global $wp_theme_directories, $wp_customize, $sidebars_widgets;
$_sidebars_widgets = null;
if ( 'wp_ajax_customize_save' === current_action() ) {
$old_sidebars_widgets_data_setting = $wp_customize->get_setting( 'old_sidebars_widgets_data' );
if ( $old_sidebars_widgets_data_setting ) {
$_sidebars_widgets = $wp_customize->post_value( $old_sidebars_widgets_data_setting );
}
} elseif ( is_array( $sidebars_widgets ) ) {
$_sidebars_widgets = $sidebars_widgets;
}
if ( is_array( $_sidebars_widgets ) ) {
set_theme_mod( 'sidebars_widgets', array( 'time' => time(), 'data' => $_sidebars_widgets ) );
}
$nav_menu_locations = get_theme_mod( 'nav_menu_locations' );
update_option( 'theme_switch_menu_locations', $nav_menu_locations );
if ( func_num_args() > 1 ) {
$stylesheet = func_get_arg( 1 );
}
$old_theme = wp_get_theme();
$new_theme = wp_get_theme( $stylesheet );
$template = $new_theme->get_template();
update_option( 'template', $template );
update_option( 'stylesheet', $stylesheet );
if ( count( $wp_theme_directories ) > 1 ) {
update_option( 'template_root', get_raw_theme_root( $template, true ) );
update_option( 'stylesheet_root', get_raw_theme_root( $stylesheet, true ) );
} else {
delete_option( 'template_root' );
delete_option( 'stylesheet_root' );
}
$new_name = $new_theme->get('Name');
update_option( 'current_theme', $new_name );
// Migrate from the old mods_{name} option to theme_mods_{slug}.
if ( is_admin() && false === get_option( 'theme_mods_' . $stylesheet ) ) {
$default_theme_mods = (array) get_option( 'mods_' . $new_name );
if ( ! empty( $nav_menu_locations ) && empty( $default_theme_mods['nav_menu_locations'] ) ) {
$default_theme_mods['nav_menu_locations'] = $nav_menu_locations;
}
add_option( "theme_mods_$stylesheet", $default_theme_mods );
} else {
/*
* Since retrieve_widgets() is called when initializing a theme in the Customizer,
* we need to remove the theme mods to avoid overwriting changes made via
* the Customizer when accessing wp-admin/widgets.php.
*/
if ( 'wp_ajax_customize_save' === current_action() ) {
remove_theme_mod( 'sidebars_widgets' );
}
}
update_option( 'theme_switched', $old_theme->get_stylesheet() );
/**
* Fires after the theme is switched.
*
* @since WP-1.5.0
* @since WP-4.5.0 Introduced the `$old_theme` parameter.
*
* @param string $new_name Name of the new theme.
* @param WP_Theme $new_theme WP_Theme instance of the new theme.
* @param WP_Theme $old_theme WP_Theme instance of the old theme.
*/
do_action( 'switch_theme', $new_name, $new_theme, $old_theme );
}
Changelog
Version | Description |
---|---|
WP-2.5.0 | Introduced. |