Ticket #47304: 47304.diff

wp-includes/feed.php

@@ -672 +672 @@
         }
 
         // Determine the maximum modified time.
-        $max_modified_time = max(
-                array_map(
-                        function ( $time ) use ( $format ) {
-                                return mysql2date( $format, $time, false );
-                        },
-                        $modified_times
-                )
-        );
+        $max_modified_time = mysql2date( $format, max( $modified_times ), false );
 
         /**
          * Filters the date the last post or comment in the query was modified.