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📝 Edit File: rss.php

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

/**
 * Renders the `core/rss` block on server.
 *
 * @since 5.2.0
 *
 * @param array $attributes The block attributes.
 *
 * @return string Returns the block content with received rss items.
 */
function render_block_core_rss( $attributes ) {
	if ( in_array( untrailingslashit( $attributes['feedURL'] ), array( site_url(), home_url() ), true ) ) {
		return '<div class="components-placeholder"><div class="notice notice-error">' . __( 'Adding an RSS feed to this site’s homepage is not supported, as it could lead to a loop that slows down your site. Try using another block, like the <strong>Latest Posts</strong> block, to list posts from the site.' ) . '</div></div>';
	}

$rss = fetch_feed( $attributes['feedURL'] );

if ( is_wp_error( $rss ) ) {
		return '<div class="components-placeholder"><div class="notice notice-error"><strong>' . __( 'RSS Error:' ) . '</strong> ' . esc_html( $rss->get_error_message() ) . '</div></div>';
	}

if ( ! $rss->get_item_quantity() ) {
		return '<div class="components-placeholder"><div class="notice notice-error">' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '</div></div>';
	}

$rss_items  = $rss->get_items( 0, $attributes['itemsToShow'] );
	$list_items = '';
	foreach ( $rss_items as $item ) {
		$title = esc_html( trim( strip_tags( $item->get_title() ) ) );
		if ( empty( $title ) ) {
			$title = __( '(no title)' );
		}
		$link = $item->get_link();
		$link = esc_url( $link );
		if ( $link ) {
			$title = "<a href='{$link}'>{$title}</a>";
		}
		$title = "<div class='wp-block-rss__item-title'>{$title}</div>";

$date = '';
		if ( $attributes['displayDate'] ) {
			$date = $item->get_date( 'U' );

if ( $date ) {
				$date = sprintf(
					'<time datetime="%1$s" class="wp-block-rss__item-publish-date">%2$s</time> ',
					esc_attr( date_i18n( 'c', $date ) ),
					esc_attr( date_i18n( get_option( 'date_format' ), $date ) )
				);
			}
		}

$author = '';
		if ( $attributes['displayAuthor'] ) {
			$author = $item->get_author();
			if ( is_object( $author ) ) {
				$author = $author->get_name();
				$author = '<span class="wp-block-rss__item-author">' . sprintf(
					/* translators: byline. %s: author. */
					__( 'by %s' ),
					esc_html( strip_tags( $author ) )
				) . '</span>';
			}
		}

$excerpt = '';
		if ( $attributes['displayExcerpt'] ) {
			$excerpt = html_entity_decode( $item->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) );
			$excerpt = esc_attr( wp_trim_words( $excerpt, $attributes['excerptLength'], ' [&hellip;]' ) );

// Change existing [...] to [&hellip;].
			if ( '[...]' === substr( $excerpt, -5 ) ) {
				$excerpt = substr( $excerpt, 0, -5 ) . '[&hellip;]';
			}

$excerpt = '<div class="wp-block-rss__item-excerpt">' . esc_html( $excerpt ) . '</div>';
		}

$list_items .= "<li class='wp-block-rss__item'>{$title}{$date}{$author}{$excerpt}</li>";
	}

$classnames = array();
	if ( isset( $attributes['blockLayout'] ) && 'grid' === $attributes['blockLayout'] ) {
		$classnames[] = 'is-grid';
	}
	if ( isset( $attributes['columns'] ) && 'grid' === $attributes['blockLayout'] ) {
		$classnames[] = 'columns-' . $attributes['columns'];
	}
	if ( $attributes['displayDate'] ) {
		$classnames[] = 'has-dates';
	}
	if ( $attributes['displayAuthor'] ) {
		$classnames[] = 'has-authors';
	}
	if ( $attributes['displayExcerpt'] ) {
		$classnames[] = 'has-excerpts';
	}

$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classnames ) ) );

return sprintf( '<ul %s>%s</ul>', $wrapper_attributes, $list_items );
}

/**
 * Registers the `core/rss` block on server.
 *
 * @since 5.2.0
 */
function register_block_core_rss() {
	register_block_type_from_metadata(
		__DIR__ . '/rss',
		array(
			'render_callback' => 'render_block_core_rss',
		)
	);
}
add_action( 'init', 'register_block_core_rss' );

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