Ticket #38942: 38942.1.diff

src/wp-includes/theme.php

@@ -1234 +1234 @@
                 }
         }
 
+        /*
+         * Filters the list of header image attributes.
+         *
+         * @since 5.9.0
+         *
+         * @param array  $attr   Array of the attributes for the image tag.
+         * @param object $header The custom header object returned by 'get_custom_header()'.
+         */
+        $attr = apply_filters( 'get_header_image_tag_attributes', $attr, $header );
+
         $attr = array_map( 'esc_attr', $attr );
         $html = '<img';