Ticket #22258: 22258.3.diff

wp-includes/functions.php

@@ -902 +902 @@
 function wp_get_nocache_headers() {
         $headers = array(
                 'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
-                'Last-Modified' => gmdate( 'D, d M Y H:i:s' ) . ' GMT',
+                'Last-Modified' => '',
                 'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
                 'Pragma' => 'no-cache',
         );
@@ -926 +926 @@
         $headers = wp_get_nocache_headers();
         foreach( $headers as $name => $field_value )
                 @header("{$name}: {$field_value}");
+        if ( empty( $headers['Last-Modified'] ) && function_exists( 'header_remove' ) )
+                header_remove( 'Last-Modified' );
 }
 
 /**

wp-includes/class-wp.php

@@ -381 +381 @@
                 foreach( (array) $headers as $name => $field_value )
                         @header("{$name}: {$field_value}");
 
+                if ( empty( $headers['Last-Modified'] ) && function_exists( 'header_remove' ) )
+                        header_remove( 'Last-Modified' );
+
                 if ( $exit_required )
                         exit();