Ticket #46054: 46054.diff

src/wp-includes/functions.php

@@ -3236 +3236 @@
                 if ( null !== $r['response'] ) {
                         status_header( $r['response'] );
                 }
+                nocache_headers();
         }
 
         echo wp_json_encode( $data );
@@ -3263 +3264 @@
 
         list( $message, $title, $r ) = _wp_die_process_input( $message, $title, $args );
 
+
+        if ( ! headers_sent() ) {
+                nocache_headers();
+        }
+
         if ( $wp_xmlrpc_server ) {
                 $error = new IXR_Error( $r['response'], $message );
                 $wp_xmlrpc_server->output( $error->getXml() );
@@ -3294 +3300 @@
         list( $message, $title, $r ) = _wp_die_process_input( $message, $title, $args );
 
         // This is intentional. For backward-compatibility, support passing null here.
-        if ( ! headers_sent() && null !== $args['response'] ) {
-                status_header( $r['response'] );
+        if ( ! headers_sent() ) {
+            if( null !== $args['response'] ) {
+                        status_header( $r['response'] );
+                }
+                nocache_headers();
         }
 
         if ( is_scalar( $message ) ) {