Clear Cache

suzie

Dear friends,
Our Site is made out of different pages...for example when we add a banner to be uploaded on the site, it does not appear directly after the refresh, but we have always to do "Clear cache" using function SureRemoveDir($dir) . and after clear cache, some pages will be lost, so we have to re-do clear cache until all pages re-appear...

is there a way where we can see new addition to website without clear cache..??
and what is the problem that we are facing??

thanks a lot,

Regards,

Kudose

Are you talking about client side or server side caching?

You can send the proper [man]header[/man]s to expire your data. If you are talking server side, you would need to refer to your caching mechanisms documentation.

suzie

Hi,
Thanks a lot for your reply,
in our PHP code we are using (cache_header.php) and (cache_footer.php), that cache the page, in order not to retreive it from the server each time requested (as for the same visitor).
but it seems that this method makes the site slow and with many problems.
as i said before the pages are stucked in the cache, and with any change in the Back office we have to do many time "clear cache" to obtain the correct pages,

please any suggestion on the cache to get a good site.
and what is the proper header for cache to let it expires.

thanks a lot for your follow...

Best Regards,

Kudose

You could still be getting the browser cache. Hold down Control and hit F5 to refresh your page our of browser cache.

If you still get the same data, you have a problem with server-side caching.

It sounds like your cache files are also proprietary and may not be the culprit. Check and see if you are running a PHP accelerator or caching tool such as APC and refer to it's documentation on clearing the cache.

suzie

hi,
yes, i do Ctrl F5, but instead of getting the Data, sometimes the page will be open but white with no data inside, (i.e: some pages data will be lost) and after doing many clear cache they re-appear...

on the web server we have the Zend Optimizer V.3.2.0

so please if you can sugget what woould be the problem,

thank you

Kudose

Ok, after a little bit of searching on the internets, I've determined that you are using a script that is having issues emptying the cache directory, so you (or someone) created the function SureRemoveDir (which is found at php.net/unlink) to remove your cache directory for you.

It seems that your files are not getting deleted properly, which is why you see some after you "clear cache". Trying adjusting the permissions on your cache directory to allow write permissions for your web service.

Alternatively, you could create a script which executes a system command to remove the files for you. Running it as either a cron job or a clickable action.

rm -f cachedir/*

Should work for you. Be sure not to use rm -rf as it is recursive and will delete your cache directory.

Hope that helps and I am not way off here.

suzie

Hi,
the problem that i'm not the one who did the whole project, I came after and now i'am trying to solve the problems.
the function used to clear cache is:
"
function SureRemoveDir($dir) {
$del_count = 0;
if(!$dh = @opendir($dir)) return;
while (($obj = readdir($dh))) {
if($obj=='.' || $obj=='..') continue;
echo "deleting " . $obj . "...<br>";
if(@unlink($dir.'/'.$obj)) $del_count++;
}
closedir($dh);
echo "<hr>Total files deleted: <b>" . $del_count . "</b>";
}
SureRemoveDir("../cache");

so do you suggest to replace this function by rm -f cachedir .

thank you,

Kudose

I would first remove the @ error suppressors to see if any error are generated, then try the system function.