WordPress Version: 6.2
/**
* Server-side rendering of the `core/rss` block.
*
* @package WordPress
*/
/**
* Renders the `core/rss` block on server.
*
* @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();
$author = '<span class="wp-block-rss__item-author">' . sprintf(
/* translators: %s: the author. */
__('by %s'),
esc_html(strip_tags($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, $attributes['excerptLength'], ' […]'));
// Change existing [...] to […].
if ('[...]' === substr($excerpt, -5)) {
$excerpt = substr($excerpt, 0, -5) . '[…]';
}
$excerpt = '<div class="wp-block-rss__item-excerpt">' . esc_html($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);
}