For Web sites with large access traffic and no need for timely updating of data, full use of caching technology can effectively reduce server pressure. Powerful caching techniques are also built into the Smarty template engine, and the Smarty caching function can be used only for simple configuration. Open Smarty Advanced cache only need to set up in the Smarty configuration file cache directory, open the cache state, set the expiration of the cache, the specific use of the following methods:
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| /***********smarty.php***********/ <?php Include ('./smarty/smarty.class.php ');//import Smarty Template engine class Instantiating Smarty objects $smarty =new smarty;// $smarty->template_dir= "Templates";//Specify Template storage directory $smarty->compile_dir= "Templates_c";//Specify compilation file storage directory $smarty->config_dir= "config";//Specify Configuration file storage directory $smarty->cache_dir= "Cache";//Specify Cached storage directory $smarty->caching=true;//to open Smarty cache $smarty->cache_lifetime=60;//to set the cache effective time (in seconds) $smarty->left_delimiter= "<{";//Specify left label $smarty->right_delimiter= "}>";//Specify Right Label ?> Smarty An example of how advanced caching is used /***********index.php***********/ <?php Include ("smarty.php"); Date_default_timezone_set (' PRC '); $nowt =date (' y-m-d h:i:s '); function Insert_buhuancun () {//locally not cached content (note!) The method name to be followed here Insert_ to the corresponding in the template file $ntime = ' PHP well-known network-'. Date ("y-m-d h:m:s"); return $ntime; } $smarty->assign (' nowt ', $nowt); $smarty->display ("index.html"); ?> /***********index.html***********/ <! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/> <title>php well-known network </title> <body> The contents will be cached for 60 seconds (that is, the time set by Cache_lifetime in the smarty.php configuration file): <font color= ' red ' ><{$nowt ></font><br/> Insert local data is not cached: <font color= ' red ' ><{insert name= ' buhuancun '}></font><br/> Block local blocks are not cached: <br/> <font color= ' Red ' > <{block name= ' Thisnocache ' nocache}> all content contained in block blocks is not cached: <{$nowt}> <{/block}> </font><br/> </body> |
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Using the Smarty advanced cache to cache some content in the database is also a good choice, not only to increase the speed of user access, but also to reduce the pressure of frequent access to the database
Use and purge of smarty cache
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$smarty->clear_all_cache (); It is clear that the cache of other templates that you don't want to clear will also be emptied. |
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Now I am in the background to this page with parameters Basic.php?a=about or =contact
The things involved in the modification Update database operations. And, of course, we need to clear out this time. All caches for the BASIC.TPL template are the two caches of about and contact.
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| //Clear multiple caches of a template A $smarty->display (' Cache.tpl ', cache_id);//create a cache with IDs $smarty->clear_all_cache ();//Clear All caches |
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