Ticket #40666: 40666.diff

wp-includes/class-walker-category.php

@@ -108 +108 @@
                         return;
                 }
 
-                $link = '<a href="' . esc_url( get_term_link( $category ) ) . '" ';
+                $atts = array();
+                $atts['href'] = get_term_link( $category );
+
                 if ( $args['use_desc_for_title'] && ! empty( $category->description ) ) {
                         /**
                          * Filters the category description for display.
@@ -118 +120 @@
                          * @param string $description Category description.
                          * @param object $category    Category object.
                          */
-                        $link .= 'title="' . esc_attr( strip_tags( apply_filters( 'category_description', $category->description, $category ) ) ) . '"';
+                        $atts['title'] = strip_tags( apply_filters( 'category_description', $category->description, $category ) );
+                }
+
+                /**
+                 * Filters the HTML attributes applied to a category menu item's anchor element.
+                 *
+                 * @since 4.8.x
+                 *
+                 * @param array $atts {
+                 *     The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
+                 *
+                 *     @type string $href The href attribute.
+                 *     @type string $title The title attribute.
+                 * }
+                 * @param WP_Term $category         Term data object.
+                 * @param int     $depth            Depth of category, used for padding.
+                 * @param array   $args             An array of arguments.
+                 * @param int     $current_category ID of the current category.
+                 */
+                $atts = apply_filters( 'category_menu_link_attributes', $atts, $category, $depth, $args, $id );
+
+                $attributes = '';
+                foreach ( $atts as $attr => $value ) {
+                        if ( ! empty( $value ) ) {
+                                $value = esc_attr( $value );
+                                $attributes .= ' ' . $attr . '="' . $value . '"';
+                        }
                 }
 
-                $link .= '>';
-                $link .= $cat_name . '</a>';
+                $link = sprintf(
+                        '<a%s>%s</a>',
+                        $attributes,
+                        $cat_name
+                );
 
                 if ( ! empty( $args['feed_image'] ) || ! empty( $args['feed'] ) ) {
                         $link .= ' ';