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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