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Hpatoio
Smarty Rookie
Joined: 29 Apr 2003
Posts: 25
Location: Italy
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 Posted: Fri Oct 29, 2004 8:10 am Post subject: Cache based on version_date |
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Hello.
- I have a page that list the content of a table and when the user click on "detail" the detail page is displayed  (hard to guess)
The point is that the "detail page" makes a lot of math operation with the detail data and this stress quite a lot my server.
What I want is to cache the "detail page" until the data are modified.
I explain more :
In my table I have a "version_date" field that contain the timestamp of last time the data of that row where modified.
I would like to have something like :
| Code: |
if ( $version_date_of_the_row < timestamp_of_the_cache_file) {
Display the cache version of the page
} else {
Create a new cache version of the page and display it
}
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So, the question is : How do I get the timestamp of the cached file 
Simone
PS: Something else in the manual, at the page where you explain how to write a custom "$cache_handler_func" (http://smarty.php.net/manual/en/section.template.cache.handler.func.php) the variable "$cache_contentS" shouldn't be "$cache_content" (no S at the end) at the line :
[php:1:a3effc0a94]<?php
$cache_contents = gzuncompress($row["CacheContents"]);
?>[/php:1:a3effc0a94] |
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messju
Administrator
Joined: 16 Apr 2003
Posts: 3336
Location: Oldenburg, Germany
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| Posted: Fri Oct 29, 2004 10:05 am Post subject: Re: Cache based on version_date |
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hello,
you can't get the cached-files timestamp with smarty's api.
you'd have to use your own cache-handler functions, then you know where you store that info and thus should know how to retrieve it 
another way: just clear the corresponding cached template when you update the data-row.
then the cached page will be re-generated as soon as somebody asks for it.
| Quote: | PS: Something else in the manual, at the page where you explain how to write a custom "$cache_handler_func" (http://smarty.php.net/manual/en/section.template.cache.handler.func.php) the variable "$cache_contentS" shouldn't be "$cache_content" (no S at the end) at the line :
[php:1:03a72355ea]<?php
$cache_contents = gzuncompress($row["CacheContents"]);
?>[/php:1:03a72355ea] |
ah, thanks for pointing that out. i fixed it in the cvs of the docs. it will be in the online-manual after the next manual-rebuild (whenever this may be )
greetings
messju |
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Hpatoio
Smarty Rookie
Joined: 29 Apr 2003
Posts: 25
Location: Italy
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| Posted: Fri Oct 29, 2004 12:18 pm Post subject: Re: Cache based on version_date |
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| messju wrote: | hello,
you'd have to use your own cache-handler functions, then you know where you store that info and thus should know how to retrieve it
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I don't know what you mean, how do I call my custom_handler_function to have the cache timestamp ?
I thought I had to call
[php:1:cb9b805291]<?php
$smarty->is_cached("my_template.tpl");
?>[/php:1:cb9b805291]
to know if my template is cached or not ... but I don't see any way to overwrite the function "is_cached".
Is this possible ?
| messju wrote: |
another way: just clear the corresponding cached template when you update the data-row.
then the cached page will be re-generated as soon as somebody asks for it.
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I thought about ... but the row is not updated by a PHP script. |
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