WP_Widget_RSS

17class WP_Widget_RSS extends WP_Widget {18 19	/**20	 * Sets up a new RSS widget instance.21	 *22	 * @since 2.8.023	 */24	public function __construct() {25		$widget_ops = array(26			'description'                 => __( 'Entries from any RSS or Atom feed.' ),27			'customize_selective_refresh' => true,28			'show_instance_in_rest'       => true,29 30		);31		$control_ops = array(32			'width'  => 400,33			'height' => 200,34		);35		parent::__construct( 'rss', __( 'RSS' ), $widget_ops, $control_ops );36	}37 38	/**39	 * Outputs the content for the current RSS widget instance.40	 *41	 * @since 2.8.042	 *43	 * @param array $args     Display arguments including 'before_title', 'after_title',44	 *                        'before_widget', and 'after_widget'.45	 * @param array $instance Settings for the current RSS widget instance.46	 */47	public function widget( $args, $instance ) {48		if ( isset( $instance['error'] ) && $instance['error'] ) {49			return;50		}51 52		$url = ! empty( $instance['url'] ) ? $instance['url'] : '';53		while ( ! empty( $url ) && stristr( $url, 'http' ) !== $url ) {54			$url = substr( $url, 1 );55		}56 57		if ( empty( $url ) ) {58			return;59		}60 61		// Self-URL destruction sequence.62		if ( in_array( untrailingslashit( $url ), array( site_url(), home_url() ), true ) ) {63			return;64		}65 66		$rss   = fetch_feed( $url );67		$title = $instance['title'];68		$desc  = '';69		$link  = '';70 71		if ( ! is_wp_error( $rss ) ) {72			$desc = esc_attr( strip_tags( html_entity_decode( $rss->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) ) ) );73			if ( empty( $title ) ) {74				$title = strip_tags( $rss->get_title() );75			}76			$link = strip_tags( $rss->get_permalink() );77			while ( ! empty( $link ) && stristr( $link, 'http' ) !== $link ) {78				$link = substr( $link, 1 );79			}80		}81 82		if ( empty( $title ) ) {83			$title = ! empty( $desc ) ? $desc : __( 'Unknown Feed' );84		}85 86		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */87		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );88 89		if ( $title ) {90			$feed_url  = strip_tags( $url );91			$feed_icon = includes_url( 'images/rss.png' );92 93			$feed_link = sprintf(94				'<a class="rsswidget rss-widget-feed" href="%1$s"><img class="rss-widget-icon" style="border:0" width="14" height="14" src="%2$s" alt="%3$s"%4$s /></a> ',95				esc_url( $feed_url ),96				esc_url( $feed_icon ),