Smarty模板引擎缓存机制详解

$smarty->cache_dir = "/caches/"; //缓存目录
$smarty->caching = true; //开启缓存,为flase的时侯缓存无效
$smarty->cache_lifetime = 3600; //缓存时间

$smarty->display('index.tpl',$_GET["article_id"]);

if(!$smarty->is_cached('index.tpl')){
 //调用数据库
}
$smarty->display('index.tpl');

clear_all_cache();//清除所有缓存
clear_cache('index.tpl');//清除index.tpl的缓存
clear_cache('index.tpl',cache_id);//清除指定id的缓存

smarty_block_name($params,$content, &$smarty){return $content;} 
//name表示区域名

$smarty->register_block(name, smarty_block_name, false);
//第三参数false表示该区域不被缓存

{name}内容 {/name}

<?php
function smarty_block_cacheless($param, $content, &$smarty) {
return $content;
}
?>

<?php
include(Smarty.class.php);
$smarty = new Smarty;
$smarty->caching=true;
$smarty->cache_lifetime = 6;
$smarty->display(cache.tpl);
?>

已经缓存的:{$smarty.now}<br>
{cacheless}
没有缓存的:{$smarty.now}
{/cacheless}

if($tag_command == cacheless) $this->_plugins[block][$tag_command] = array($plugin_func, null, null, null, false);
else $this->_plugins[block][$tag_command] = array($plugin_func, null, null, null, true);

<div>{current_time}{/div}
index.php:
function smarty_function_current_time($params, &$smarty){
  return date("Y-m-d H:m:s");
}
$smarty=new smarty();
$smarty->caching = true;
$smarty->register_function('current_time','smarty_function_current_time',false);
if(!$smarty->is_cached()){
  .......
}
$smarty->display('index.tpl');