1<?php 2# This resource won't be cached by network layer, but will be cached by appcache. 3header("Last-Modified: Thu, 01 Dec 2003 16:00:00 GMT"); 4header("Expires: Thu, 01 Dec 2003 16:00:00 GMT"); 5header("Cache-Control: no-cache, no-store"); 6header("Pragma: no-cache"); 7header("Content-Type: text/plain"); 8 9if ($_SERVER['HTTP_IF_MODIFIED_SINCE'] || $_SERVER['HTTP_IF_NONE_MATCH']) 10 header("HTTP/1.1 304 Not Modified"); 11else 12 print("Hello, world!\n"); 13?> 14