Multiple Caches Per Page [每页多个缓存] - Smarty模板引擎中文在线手册

is_cached() and clear_cache().
确定传给is_cached()和clear_cache()的第二参数是同一个cache_id。

Example 14-7. passing a cache_id to is_cached()
例14-7.传给is_cached()一个cache_id

require('smarty.class.PHP');
$smarty = new Smarty;

$smarty->caching = true;

$my_cache_id = $_GET['article_id'];

if(!$smarty->is_cached('index.tpl',$my_cache_id)) {
	// No cache available, do variable assignments here.
	$contents = get_database_contents();
	$smarty->assign($contents);
}

$smarty->display('index.tpl',$my_cache_id);

You can clear all caches for a particular cache_id by passing null as the first parameter to clear_cache().
你可以通过把clear_cache()的第一参数设为null来为特定的cache_id清除所有缓存。

Example 14-8. clearing all caches for a particular cache_id
例14-8.为特定的cache_id清除所有缓存

require('Smarty.class.php');
$smarty = new Smarty;

$smarty->caching = true;

// clear all caches with "sports" as the cache_id
$smarty->clear_cache(null,"sports");

$smarty->display('index.tpl',"sports");

In this manner, you can "group" your caches together by giving them the same cache_id.
通过这种方式，你可以用相同的cache_id来把你的缓存集合起来。