name : class-wp-widget-rss.php <?php /** * Widget API: WP_Widget_RSS class * * @package WordPress * @subpackage Widgets * @since 4.4.0 */ /** * Core class used to implement a RSS widget. * * @since 2.8.0 * * @see WP_Widget */ class WP_Widget_RSS extends WP_Widget { /** * Sets up a new RSS widget instance. * * @since 2.8.0 */ public function __construct() { $widget_ops = array( 'description' => __( 'Entries from any RSS or Atom feed.' ), 'customize_selective_refresh' => true, 'show_instance_in_rest' => true, ); $control_ops = array( 'width' => 400, 'height' => 200, ); parent::__construct( 'rss', __( 'RSS' ), $widget_ops, $control_ops ); } /** * Outputs the content for the current RSS widget instance. * * @since 2.8.0 * * @param array $args Display arguments including 'before_title', 'after_title', * 'before_widget', and 'after_widget'. * @param array $instance Settings for the current RSS widget instance. */ public function widget( $args, $instance ) { if ( isset( $instance['error'] ) && $instance['error'] ) { return; } $url = ! empty( $instance['url'] ) ? $instance['url'] : ''; while ( ! empty( $url ) && stristr( $url, 'http' ) !== $url ) { $url = substr( $url, 1 ); } if ( empty( $url ) ) { return; } // Self-URL destruction sequence. if ( in_array( untrailingslashit( $url ), array( site_url(), home_url() ), true ) ) { return; } $rss = fetch_feed( $url ); $title = $instance['title']; $desc = ''; $link = ''; if ( ! is_wp_error( $rss ) ) { $desc = esc_attr( strip_tags( html_entity_decode( $rss->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) ) ) ); if ( empty( $title ) ) { $title = strip_tags( $rss->get_title() ); } $link = strip_tags( $rss->get_permalink() ); while ( ! empty( $link ) && stristr( $link, 'http' ) !== $link ) { $link = substr( $link, 1 ); } } if ( empty( $title ) ) { $title = ! empty( $desc ) ? $desc : __( 'Unknown Feed' ); } /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */ $title = apply_filters( 'widget_title', $title, $instance, $this->id_base ); if ( $title ) { $feed_link = ''; $feed_url = strip_tags( $url ); $feed_icon = includes_url( 'images/rss.png' ); $feed_link = sprintf( '<a class="rsswidget rss-widget-feed" href="%1$s"><img class="rss-widget-icon" style="border:0" width="14" height="14" src="%2$s" alt="%3$s"%4$s /></a> ', esc_url( $feed_url ), esc_url( $feed_icon ), esc_attr__( 'RSS' ), ( wp_lazy_loading_enabled( 'img', 'rss_widget_feed_icon' ) ? ' loading="lazy"' : '' ) ); /** * Filters the classic RSS widget's feed icon link. * * Themes can remove the icon link by using `add_filter( 'rss_widget_feed_link', '__return_empty_string' );`. * * @since 5.9.0 * * @param string|false $feed_link HTML for link to RSS feed. * @param array $instance Array of settings for the current widget. */ $feed_link = apply_filters( 'rss_widget_feed_link', $feed_link, $instance ); $title = $feed_link . '<a class="rsswidget rss-widget-title" href="' . esc_url( $link ) . '">' . esc_html( $title ) . '</a>'; } echo $args['before_widget']; if ( $title ) { echo $args['before_title'] . $title . $args['after_title']; } $format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml'; /** This filter is documented in wp-includes/widgets/class-wp-nav-menu-widget.php */ $format = apply_filters( 'navigation_widgets_format', $format ); if ( 'html5' === $format ) { // The title may be filtered: Strip out HTML and make sure the aria-label is never empty. $title = trim( strip_tags( $title ) ); $aria_label = $title ? $title : __( 'RSS Feed' ); echo '<nav aria-label="' . esc_attr( $aria_label ) . '">'; } wp_widget_rss_output( $rss, $instance ); if ( 'html5' === $format ) { echo '</nav>'; } echo $args['after_widget']; if ( ! is_wp_error( $rss ) ) { $rss->__destruct(); } unset( $rss ); } /** * Handles updating settings for the current RSS widget instance. * * @since 2.8.0 * * @param array $new_instance New settings for this instance as input by the user via * WP_Widget::form(). * @param array $old_instance Old settings for this instance. * @return array Updated settings to save. */ public function update( $new_instance, $old_instance ) { $testurl = ( isset( $new_instance['url'] ) && ( ! isset( $old_instance['url'] ) || ( $new_instance['url'] !== $old_instance['url'] ) ) ); return wp_widget_rss_process( $new_instance, $testurl ); } /** * Outputs the settings form for the RSS widget. * * @since 2.8.0 * * @param array $instance Current settings. */ public function form( $instance ) { if ( empty( $instance ) ) { $instance = array( 'title' => '', 'url' => '', 'items' => 10, 'error' => false, 'show_summary' => 0, 'show_author' => 0, 'show_date' => 0, ); } $instance['number'] = $this->number; wp_widget_rss_form( $instance ); } }