send Last-Modified header with the local image

diff --git a/image.php b/image.php
index cccda64b73380d0336aefedbff33f19a6c0fa0c1..36da375aabbde9e4055027f2bb9ba3999b349649 100644 (file)
--- a/image.php
+++ b/image.php
@@ -28,6 +28,8 @@
 
                if (file_exists($filename)) {
                        header("Content-type: image/png");
+                       $stamp = gmdate("D, d M Y H:i:s", filemtime($filename)). " GMT";
+                       header("Last-Modified: $stamp", true);
                        echo file_get_contents($filename);
                } else {
                        header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");