Home Backend Development PHP Tutorial Smarty高级应用之缓存操作技巧分析_PHP

Smarty高级应用之缓存操作技巧分析_PHP

May 27, 2016 am 10:15 AM
smarty Caching operations

本文实例讲述了Smarty高级应用之缓存操作技巧。分享给大家供大家参考,具体如下:

smarty缓存控制

smarty提供了强大的缓存功能。但有时我们并不希望整篇文档都被缓存,而是有选择的缓存某一部分内容或某一部分内容不被缓存。例如你在页面上端使用一个带有广告条位置的模板,广告条可以包含任何HTML、图象、FLASH等混合信息. 因此这里不能使用一个静态的链接,同时我们也不希望该广告条被缓存. 这就需要在 insert 函数指定,同时需要一个函数取广告条的内容信息。smarty也提供了这种缓存控制能力。

代码如下:

$smarty->register_function('current_time','smarty_function_current_time',false);

但insert函数默认是不缓存的。并且这个属性不能修改。从这个意义上讲insert函数对缓存的控制能力似乎不如register_function和register_block强。

(2)使用方便性:

但是insert函数使用非常方便。不用显示注册,只要在当前请求过程中包含这个函数smarty就会自动在当前请求的过程中查找指定的函数。

当然register_function也可以做到不在运行时显示注册。但是那样做的效果跟其他模版函数一样,统统被缓存,并且不能控制。

如果你使用在运行时显示调用register_function注册自定义函数,那么一定要在调用is_cached()方法前完成函数的注册工作。

否则在is_cached()这一步缓存文档将因为找不到注册函数而导致smarty错误

Smarty用户自定义函数实例

<&#63;php
$smarty->register_function('date_now', 'print_current_date');
function print_current_date($params, &$smarty)
{
 if(empty($params['format'])) {
  $format = "%b %e, %Y";
 } else {
  $format = $params['format'];
 }
 return strftime($format,time());
}
&#63;>

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在模板中使用

{date_now}
{* or to format differently *}
{date_now format="%Y/%m/%d"}

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更多关于Smarty相关内容感兴趣的读者可查看本站专题:《smarty模板入门基础教程》、《PHP模板技术总结》、《PHP基于pdo操作数据库技巧总结》、《PHP运算与运算符用法总结》、《PHP网络编程技巧总结》、《PHP基本语法入门教程》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家基于smarty模板的PHP程序设计有所帮助。

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