Home php教程 php手册 Smarty的缓存操作技巧

Smarty的缓存操作技巧

Jun 13, 2016 am 10:37 AM
smarty tr one use turn on Skill operate of cache want

一、使用缓存
要开启smarty的缓存,只需将caching设为true,并指定cache_dir即可.
使用cache_lefetime指定缓存生存时间,单位为秒
要对相同页面生成多个不同的缓存,在display或fetch中加入第二参数cache_id,如$smarty->display(index.tpl,$my_cache_id);此特性可用于对不同的$_GET进行不同的缓存
 
二、清除缓存

 

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

三、使用自定义缓存方式

设置cache_handler_func使用自定义的函数处理缓存
如:
$smarty->cache_handler_func = "myCache";
function myCache($action, &$smarty_obj, &$cache_content, $tpl_file=null, $cache_id=null, $compile_id=null){
}
该函数的一般是根椐$action来判断缓存当前操作:
switch($action){
case "read"://读取缓存内容
case "write"://写入缓存
case "clear"://清空
}
一般使用md5($tpl_file.$cache_id.$compile_id)作为唯一的cache_id
如果需要,可使用gzcompress和gzuncompress来压缩和解压
 
四、局部关闭缓存

要在某些区域使缓存失效(只对需要的缓存),有几种方法:
insert:
定义一个insert标签要使用的处理函数,函数名格式为:insert_xx(array $params, object &$smarty)其中的xx是insert的name,也就是说,如果你定义的函数为insert_abc,则模板中使用方法为{insert name=abc}
参数通过$params传入
也可以做成insert插件,文件名命名为:insert.xx.php,函数命名为:smarty_insert_aa($params,&$smarty),xx定义同上
register_block:
定义一个block:smarty_block_name($params,$content, &$smarty){return $content;} //name表示区域名
注册block:$smarty->register_block(name, smarty_block_name, false); //第三参数false表示该区域不被缓存
模板写法:{name}内容{/name}
写成block插件:
1)定义一件插件函数:block.cacheless.php,放在smarty的plugins目录
block.cacheless.php的内容如下:

function smarty_block_cacheless($param, $content, &$smarty) {
     return $content;
}
?>
 
2) 编写程序及模板
示例程序:testCacheLess.php

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

所用的模板:cache.tpl

已经缓存的:{$smarty.now}

{cacheless}
没有缓存的:{$smarty.now}
{/cacheless}

 

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