Validates and remaps any “orphaned” widgets to wp_inactive_widgets sidebar, and saves the widget settings. This has to run at least on each theme change.
Description
For example, let’s say theme A has a "footer" sidebar, and theme B doesn’t have one.
After switching from theme A to theme B, all the widgets previously assigned to the footer would be inaccessible. This function detects this scenario, and moves all the widgets previously assigned to the footer under wp_inactive_widgets.
Despite the word "retrieve" in the name, this function actually updates the database and the global $sidebars_widgets. For that reason it should not be run on front end, unless the $theme_changed value is ‘customize’ (to bypass the database write).
Parameters
$theme_changedstring|booloptional- Whether the theme was changed as a boolean. A value of
'customize'defers updates for the Customizer.Default:
false
Source
function retrieve_widgets( $theme_changed = false ) {
global $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets;
$registered_sidebars_keys = array_keys( $wp_registered_sidebars );
$registered_widgets_ids = array_keys( $wp_registered_widgets );
if ( ! is_array( get_theme_mod( 'sidebars_widgets' ) ) ) {
if ( empty( $sidebars_widgets ) ) {
return array();
}
unset( $sidebars_widgets['array_version'] );
$sidebars_widgets_keys = array_keys( $sidebars_widgets );
sort( $sidebars_widgets_keys );
sort( $registered_sidebars_keys );
if ( $sidebars_widgets_keys === $registered_sidebars_keys ) {
$sidebars_widgets = _wp_remove_unregistered_widgets( $sidebars_widgets, $registered_widgets_ids );
return $sidebars_widgets;
}
}
// Discard invalid, theme-specific widgets from sidebars.
$sidebars_widgets = _wp_remove_unregistered_widgets( $sidebars_widgets, $registered_widgets_ids );
$sidebars_widgets = wp_map_sidebars_widgets( $sidebars_widgets );
// Find hidden/lost multi-widget instances.
$shown_widgets = array_merge( ...array_values( $sidebars_widgets ) );
$lost_widgets = array_diff( $registered_widgets_ids, $shown_widgets );
foreach ( $lost_widgets as $key => $widget_id ) {
$number = preg_replace( '/.+?-([0-9]+)$/', '$1', $widget_id );
// Only keep active and default widgets.
if ( is_numeric( $number ) && (int) $number < 2 ) {
unset( $lost_widgets[ $key ] );
}
}
$sidebars_widgets['wp_inactive_widgets'] = array_merge( $lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets'] );
if ( 'customize' !== $theme_changed ) {
// Update the widgets settings in the database.
wp_set_sidebars_widgets( $sidebars_widgets );
}
return $sidebars_widgets;
}
Changelog
| Version | Description |
|---|---|
| 2.8.0 | Introduced. |
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