Ticket #28978: 28978.patch

src/wp-includes/functions.php

@@ -2654 +2654 @@
 function wp_send_json_error( $data = null ) {
         $response = array( 'success' => false );
 
-        if ( isset( $data ) )
-                $response['data'] = $data;
+        if ( isset( $data ) ) {
+                if ( is_wp_error( $data ) ) {
+                        $result = array();
+                        foreach ( (array) $data->errors as $code => $messages ) {
+                                foreach ( (array) $messages as $message ) {
+                                        $result[] = array( 'code' => $code, 'message' => $message );
+                                }
+                        }
 
+                        $response['data'] = $result;
+                } else {
+                        $response['data'] = $data;
+                }
+        }
+
         wp_send_json( $response );
 }