gistfile1.php

<?php

require "../includes/smarty/Smarty.class.php";
$smarty = new Smarty;
$smarty->template_dir 	= 'templates';
$smarty->compile_dir  	= 'compile'; 

$smarty->cache_dir    	= '/var/www/site/tmp';
$smarty->caching      	= true;
$smarty->force_compile	= true;  
$smarty->compile_id     = '';

$smarty->cache_handler_func = 'server_rewrite_cache_handler';
function server_rewrite_cache_handler($action, &$smarty_obj, &$cache_content, $tpl_file=null, $cache_id=null, $compile_id=null, $exp_time=null) 
{
	$cache_file = $smarty_obj->cache_dir . '/' . $compile_id . $cache_id;	
	if(!is_file($cache_file)) { 
		$base_file =  basename($cache_file);
		$base_dir = dirname($cache_file);  
		if(!is_dir($base_dir)) mkdir($base_dir, 0777, true); 
	}
    switch ($action) {
        case 'read':
        	if(!is_file($cache_file)) return false; else return true; 
            break;
        case 'write':
        	return file_put_contents($cache_file, $cache_content); 
            break;            
        case 'clear':
        	return @unlink($cache_file);
            break;            
        default:
            return false;
            break;
    }
}

$_p = $_REQUEST['p']; // detect the actual file path requested so I can save the cached copy with the correct path and filename 
$page = ''; // my logic here to determine the correct smarty template to display
$smarty->display($page, $_p);

?>