File Manager

📂 File Manager

📝 Edit File: legacy-widget.php

<?php
/**
 * Server-side rendering of the `core/legacy-widget` block.
 *
 * @package WordPress
 */

/**
 * Renders the 'core/legacy-widget' block.
 *
 * @since 5.8.0
 *
 * @global int $wp_widget_factory.
 *
 * @param array $attributes The block attributes.
 *
 * @return string Rendered block.
 */
function render_block_core_legacy_widget( $attributes ) {
	global $wp_widget_factory;

if ( isset( $attributes['id'] ) ) {
		$sidebar_id = wp_find_widgets_sidebar( $attributes['id'] );
		return wp_render_widget( $attributes['id'], $sidebar_id );
	}

if ( ! isset( $attributes['idBase'] ) ) {
		return '';
	}

$id_base       = $attributes['idBase'];
	$widget_key    = $wp_widget_factory->get_widget_key( $id_base );
	$widget_object = $wp_widget_factory->get_widget_object( $id_base );

if ( ! $widget_key || ! $widget_object ) {
		return '';
	}

if ( isset( $attributes['instance']['encoded'], $attributes['instance']['hash'] ) ) {
		$serialized_instance = base64_decode( $attributes['instance']['encoded'] );
		if ( ! hash_equals( wp_hash( $serialized_instance ), (string) $attributes['instance']['hash'] ) ) {
			return '';
		}
		$instance = unserialize( $serialized_instance );
	} else {
		$instance = array();
	}

$args = array(
		'widget_id'   => $widget_object->id,
		'widget_name' => $widget_object->name,
	);

ob_start();
	the_widget( $widget_key, $instance, $args );
	return ob_get_clean();
}

/**
 * Registers the 'core/legacy-widget' block.
 *
 * @since 5.8.0
 */
function register_block_core_legacy_widget() {
	register_block_type_from_metadata(
		__DIR__ . '/legacy-widget',
		array(
			'render_callback' => 'render_block_core_legacy_widget',
		)
	);
}

add_action( 'init', 'register_block_core_legacy_widget' );

/**
 * Intercepts any request with legacy-widget-preview in the query param and, if
 * set, renders a page containing a preview of the requested Legacy Widget
 * block.
 *
 * @since 5.8.0
 */
function handle_legacy_widget_preview_iframe() {
	if ( empty( $_GET['legacy-widget-preview'] ) ) {
		return;
	}

if ( ! current_user_can( 'edit_theme_options' ) ) {
		return;
	}

define( 'IFRAME_REQUEST', true );

?>
	<!doctype html>
	<html <?php language_attributes(); ?>>
	<head>
		<meta charset="<?php bloginfo( 'charset' ); ?>" />
		<meta name="viewport" content="width=device-width, initial-scale=1" />
		<link rel="profile" href="https://gmpg.org/xfn/11" />
		<?php wp_head(); ?>
		<style>
			/* Reset theme styles */
			html, body, #page, #content {
				padding: 0 !important;
				margin: 0 !important;
			}

/* Hide root level text nodes */
			body {
				font-size: 0 !important;
			}

/* Hide non-widget elements */
			body *:not(#page):not(#content):not(.widget):not(.widget *) {
				display: none !important;
				font-size: 0 !important;
				height: 0 !important;
				left: -9999px !important;
				max-height: 0 !important;
				max-width: 0 !important;
				opacity: 0 !important;
				pointer-events: none !important;
				position: absolute !important;
				top: -9999px !important;
				transform: translate(-9999px, -9999px) !important;
				visibility: hidden !important;
				z-index: -999 !important;
			}

/* Restore widget font-size */
			.widget {
				font-size: var(--global--font-size-base);
			}
		</style>
	</head>
	<body <?php body_class(); ?>>
		<div id="page" class="site">
			<div id="content" class="site-content">
				<?php
				$registry = WP_Block_Type_Registry::get_instance();
				$block    = $registry->get_registered( 'core/legacy-widget' );
				echo $block->render( $_GET['legacy-widget-preview'] );
				?>
			</div>
		</div>
		<?php wp_footer(); ?>
	</body>
	</html>
	<?php

exit;
}

// Use admin_init instead of init to ensure get_current_screen function is already available.
// This isn't strictly required, but enables better compatibility with existing plugins.
// See: https://github.com/WordPress/gutenberg/issues/32624.
add_action( 'admin_init', 'handle_legacy_widget_preview_iframe', 20 );

Type	Item Name	Actions
📁	..
📁	archives
📁	audio
📁	avatar
📁	block
📁	button
📁	buttons
📁	calendar
📁	categories
📁	code
📁	column
📁	columns
📁	comment-author-name
📁	comment-content
📁	comment-date
📁	comment-edit-link
📁	comment-reply-link
📁	comment-template
📁	comments
📁	comments-pagination
📁	comments-pagination-next
📁	comments-pagination-numbers
📁	comments-pagination-previous
📁	comments-title
📁	cover
📁	details
📁	embed
📁	file
📁	footnotes
📁	freeform
📁	gallery
📁	group
📁	heading
📁	home-link
📁	html
📁	image
📁	latest-comments
📁	latest-posts
📁	legacy-widget
📁	list
📁	list-item
📁	loginout
📁	media-text
📁	missing
📁	more
📁	navigation
📁	navigation-link
📁	navigation-submenu
📁	nextpage
📁	page-list
📁	page-list-item
📁	paragraph
📁	pattern
📁	post-author
📁	post-author-biography
📁	post-author-name
📁	post-comments-form
📁	post-content
📁	post-date
📁	post-excerpt
📁	post-featured-image
📁	post-navigation-link
📁	post-template
📁	post-terms
📁	post-title
📁	preformatted
📁	pullquote
📁	query
📁	query-no-results
📁	query-pagination
📁	query-pagination-next
📁	query-pagination-numbers
📁	query-pagination-previous
📁	query-title
📁	quote
📁	read-more
📁	rss
📁	search
📁	separator
📁	shortcode
📁	site-logo
📁	site-tagline
📁	site-title
📁	social-link
📁	social-links
📁	spacer
📁	table
📁	tag-cloud
📁	template-part
📁	term-description
📁	text-columns
📁	verse
📁	video
📁	widget-group
📄	archives.php
📄	avatar.php
📄	block.php
📄	blocks-json.php
📄	button.php
📄	calendar.php
📄	categories.php
📄	comment-author-name.php
📄	comment-content.php
📄	comment-date.php
📄	comment-edit-link.php
📄	comment-reply-link.php
📄	comment-template.php
📄	comments-pagination-next.php
📄	comments-pagination-numbers.php
📄	comments-pagination-previous.php
📄	comments-pagination.php
📄	comments-title.php
📄	comments.php
📄	cover.php
📄	file.php
📄	footnotes.php
📄	gallery.php
📄	heading.php
📄	home-link.php
📄	image.php
📄	index.php
📄	latest-comments.php
📄	latest-posts.php
📄	legacy-widget.php
📄	list.php
📄	loginout.php
📄	media-text.php
📄	navigation-link.php
📄	navigation-submenu.php
📄	navigation.php
📄	page-list-item.php
📄	page-list.php
📄	pattern.php
📄	post-author-biography.php
📄	post-author-name.php
📄	post-author.php
📄	post-comments-form.php
📄	post-content.php
📄	post-date.php
📄	post-excerpt.php
📄	post-featured-image.php
📄	post-navigation-link.php
📄	post-template.php
📄	post-terms.php
📄	post-title.php
📄	query-no-results.php
📄	query-pagination-next.php
📄	query-pagination-numbers.php
📄	query-pagination-previous.php
📄	query-pagination.php
📄	query-title.php
📄	query.php
📄	read-more.php
📄	require-dynamic-blocks.php
📄	require-static-blocks.php
📄	rss.php
📄	search.php
📄	shortcode.php
📄	site-logo.php
📄	site-tagline.php
📄	site-title.php
📄	social-link.php
📄	tag-cloud.php
📄	template-part.php
📄	term-description.php
📄	widget-group.php