PHP template engine Smarty cache usage

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

This feature can be used to cache different $_GETs differently.

2. Clear smarty cache There are generally several ways to clear smarty cache:

clear_all_cache();//Clear all caches
clear_cache('index.tpl');//Clear the cache of the specified template index.tpl
clear_cache('index.tpl',cache_id);//Clear Specify the cache of the specified template id

3. Global cache Global caching is to generate cached pages for all pages of the entire website. To set the global cache, first we need to operate the smarty configuration file, enable the cache, specify the cache file directory, and set the cache survival time. The setting parameters are as follows: $smarty->cache_dir='./cache/'; //Set the folder to store cache files $smarty->caching=1;//Turn on caching 0, FALSE means off | Non-0 number, TRUE means on $smarty->cache_lifetime=3600//The unit is seconds (if you fill in -1, it will never expire) Next, we need to go to the specific PHP page to set the name of the specific cache file corresponding to it. In the PHP page, it can be written as follows:

$smarty->display('list2.html',md5($_SERVER['REQUEST_URI']));//Encrypt the URL of the current page (including all parameters after ?) with md5 and then Set cache file name

Note: $smarty->display('corresponding template file name', 'supplementary part of cache file name') this method.

The second parameter is not necessary. If not written, the cache file name is the encrypted file of the template file name. But this will encounter a more difficult problem, such as: http://bbs.it-home.org/article.php?id=5 http://bbs.it-home.org/article.php?id=7 These two URLs correspond to different contents, but the generated cache file names are the result of article encryption. This will cause the user to query different content but access the same cache file. Therefore, it is recommended to add an auxiliary parameter. It is a more reliable method to encrypt the access URL (including all parameters after ?) md5.

4. Partial caching Partial caching means specifying some files to generate cache files, not all files on the website. The essence of partial caching is actually partial non-caching, which means that it is not to specify which files should be cached, but to specify specific files not to be cached. Now assume there are 3 files: http://bbs.it-home.org/index.php //needs caching http://bbs.it-home.org/cate.php //needs caching http://bbs.it-home.org/article.php //No caching required The sentence $smarty->display('corresponding template file name', 'supplementary part of the cache file name') still needs to be written in the php files of the first two files. But in the third file, we need to specifically specify that no cache is required. The specific method is to write the following code before displaying the specified template: $smarty->clear_cache('corresponding template file name');//In fact, it can be written before or after $smarty->display('corresponding template file name') Of course, $smarty->display('corresponding template file name') still needs to be written. I don't want to generate a cache, so the second parameter is not needed. Note: The parameters of $smarty->clear_cache() and $smarty->display() must be written consistently

5. Partial caching Partial caching is to specify certain local places under the same page to generate cache. In fact, it does not specify which parts generate cache, but which parts do not generate cache (this is similar to the operation idea of ​​partial cache). Let’s first look at the following example: Part of the article.php file:

$time=time();
$smarty->assign('time',$lanmuarr);
function insert_timeget(){
return time();
}
$ smarty->display('article.html');

corresponding to the template file article.html part of the code:

{$time}
{insert name='timeget'}

Here is an explanation of the above example: In PHP, we only need to define a custom function named insert_ (note the underscore) with a custom supplementary name. The value returned in it does not need to be passed by the assign() method. Called directly in the template page using {insert name='custom supplementary name'}, it will not be affected by caching and will be refreshed in real time.

If you feel that using Smarty cache is not fun enough, you can also use custom cache. How to use custom cache?

You need to set cache_handler_func to use a custom function to handle the cache, such as:

$smarty->cache_handler_func="myCache";
function myCache($action,&$smarty_obj,&$cache_content,$tpl_file=null,$cache_id=null,$compile_id=null){
switch ($action){
case "read"://Read cache content
case "write"://Write cache
case "clear"://Clear
}
}