/** * 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 ) { $rss = fetch_feed( $attributes['feedURL'] ); if ( is_wp_error( $rss ) ) { return '
' . __( 'RSS Error:' ) . ' ' . $rss->get_error_message() . '
'; } if ( ! $rss->get_item_quantity() ) { // PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks. $rss->__destruct(); unset( $rss ); return '
' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '
'; } $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 ) { $title = "{$title}"; } $title = "
{$title}
"; $date = ''; if ( $attributes['displayDate'] ) { $date = $item->get_date( 'U' ); if ( $date ) { $date = sprintf( ' ', date_i18n( get_option( 'c' ), $date ), date_i18n( get_option( 'date_format' ), $date ) ); } } $author = ''; if ( $attributes['displayAuthor'] ) { $author = $item->get_author(); if ( is_object( $author ) ) { $author = $author->get_name(); $author = '' . __( 'by' ) . ' ' . esc_html( strip_tags( $author ) ) . ''; } } $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 = '
' . esc_html( $excerpt ) . '
'; } $list_items .= "
  • {$title}{$date}{$author}{$excerpt}
  • "; } $class = 'wp-block-rss'; if ( isset( $attributes['align'] ) ) { $class .= ' align' . $attributes['align']; } if ( isset( $attributes['blockLayout'] ) && 'grid' === $attributes['blockLayout'] ) { $class .= ' is-grid'; } if ( isset( $attributes['columns'] ) && 'grid' === $attributes['blockLayout'] ) { $class .= ' columns-' . $attributes['columns']; } if ( isset( $attributes['className'] ) ) { $class .= ' ' . $attributes['className']; } $list_items_markup = ""; // PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks. $rss->__destruct(); unset( $rss ); return $list_items_markup; } /** * Registers the `core/rss` block on server. */ function register_block_core_rss() { register_block_type( 'core/rss', array( 'attributes' => array( 'align' => array( 'type' => 'string', 'enum' => array( 'left', 'center', 'right', 'wide', 'full' ), ), 'className' => array( 'type' => 'string', ), 'columns' => array( 'type' => 'number', 'default' => 2, ), 'blockLayout' => array( 'type' => 'string', 'default' => 'list', ), 'feedURL' => array( 'type' => 'string', 'default' => '', ), 'itemsToShow' => array( 'type' => 'number', 'default' => 5, ), 'displayExcerpt' => array( 'type' => 'boolean', 'default' => false, ), 'displayAuthor' => array( 'type' => 'boolean', 'default' => false, ), 'displayDate' => array( 'type' => 'boolean', 'default' => false, ), 'excerptLength' => array( 'type' => 'number', 'default' => 55, ), ), 'render_callback' => 'render_block_core_rss', ) ); } add_action( 'init', 'register_block_core_rss' );