WordPress at a glance
function is not described

WP_Customize_Widgets::preview_sidebars_widgets() public WP 3.9.0

When previewing, ensures the proper previewing widgets are used.

Because wp_get_sidebars_widgets() gets called early at {@init() } (via wp_convert_widget_settings()) and can set global variable $_wp_sidebars_widgets to the value of get_option('sidebars_widgets') before the Customizer preview filter is added, it has to be reset after the filter has been added.

{} It's a method of the class: WP_Customize_Widgets{}

No Hooks.

Return

Array.

Usage

$WP_Customize_Widgets = new WP_Customize_Widgets();
$WP_Customize_Widgets->preview_sidebars_widgets( $sidebars_widgets );
$sidebars_widgets(array) (required)
List of widgets for the current sidebar.

Changelog

Since 3.9.0 Introduced.

Code of WP_Customize_Widgets::preview_sidebars_widgets() WP 5.5.1

<?php
public function preview_sidebars_widgets( $sidebars_widgets ) {
	$sidebars_widgets = get_option( 'sidebars_widgets', array() );

	unset( $sidebars_widgets['array_version'] );
	return $sidebars_widgets;
}