silverstripe-framework/static-main.php

<?php

/**
 * This file is designed to be the new 'server' of sites using StaticPublisher.
 * to use this, you need to modify your .htaccess to point all requests to
 * static-main.php, rather than main.php. This file also allows for using
 * static publisher with the subsites module.
 *
 * If you are using StaticPublisher+Subsites, set the following in _config.php:
 *   FilesystemPublisher::$domain_based_caching = true;
 * If you are not using subsites, the host-map.php file will not exist (it is
 * automatically generated by the Subsites module) and the cache will default
 * to no subdirectory.
 */

$cacheOn = true;
$hostmapLocation = '../subsites/host-map.php';

if ($cacheOn) {
	if (file_exists($hostmapLocation)) {
		include_once $hostmapLocation;
		$subsiteHostmap['default'] = isset($subsiteHostmap['default']) ? $subsiteHostmap['default'] : '';
	
		// Look for the host, and find the cache dir
		$host = str_replace('www.', '', $_SERVER['HTTP_HOST']);
		$cacheDir = (isset($subsiteHostmap[$host]) ? $subsiteHostmap[$host] : $subsiteHostmap['default']) . '/';
	} else {
		$cacheDir = '';
	}

	// Look for the file in the cachedir
	$file = preg_replace('/[^a-zA-Z0-9]/si', '_', trim($_SERVER['REQUEST_URI'], '/'));
	$file = $file ? $file : 'index';
	
	if (file_exists('../cache/'.$cacheDir.$file.'.html')) {
		header('X-cache: hit at '.date('r'));
		echo file_get_contents('../cache/'.$cacheDir.$file.'.html');
	} elseif (file_exists('../cache/'.$cacheDir.$file.'.php')) {
		header('X-cache: hit at '.date('r'));
		include_once '../cache/'.$cacheDir.$file.'.php';
	} else {
		header('X-cache: miss at '.date('r') . ' on ' . $cacheDir . $file);
		// No cache hit... fallback!!!
		include 'main.php';
	}
} else {
	include 'main.php';
}

?>