Prevent filtered links from showing up in the sitemap

Author: diedexx

src/helpers/xml-sitemap-helper.php

@@ -158,6 +158,10 @@ public function convert_indexables_to_sitemap_links( $indexables, $object_type )
 			 */
 			$url = apply_filters( 'wpseo_sitemap_entry', $url, $object_type, $indexable->object_id );
 
+			if ( ! is_array( $url ) || isset( $url['loc'] ) ) {
+				continue;
+			}
+
 			$links[] = $url;
 		}