silverstripe-staticpublisher/code/CachedPHPPage.tmpl

<?php

/**
 * This is a system-generated PHP script that performs header management for 
 * the statically cached content given below.
 *
 * @package staticpublisher
 */

define('MAX_AGE', '**MAX_AGE**');
define('LAST_MODIFIED', '**LAST_MODIFIED**');
define('CONTENT_TYPE', '**CONTENT_TYPE**');

if(MAX_AGE > 0) {
	header("Cache-Control: max-age=" . MAX_AGE);
	header("Pragma:");
} else {
	header("Cache-Control: no-cache, max-age=0, must-revalidate");
}

header("Expires: " . gmdate('D, d M Y H:i:s', time() + MAX_AGE) . ' GMT');
header("Last-modified: " . gmdate('D, d M Y H:i:s', strtotime(LAST_MODIFIED)) . ' GMT');
header('Content-Type: '.CONTENT_TYPE);

if(isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
	if(strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= strtotime(LAST_MODIFIED)) {
		header("Last-modified: " . gmdate('D, d M Y H:i:s', strtotime(LAST_MODIFIED)) . ' GMT', true, 304);
		exit;
	}
}

?>
**CONTENT**