Re: [Phplib-users] page expiry problems

[Frank B. <fb...@sy...>]

At 05:14 PM 7/1/03, Layne Weathers wrote:

>>Thanks for the ideas, but my scripts will be accessed very infrequently 
>>and I will not remember to convert them to static pages each time I make 
>>changes to them.  I have figured out that inserting the following line at 
>>top of a script appears to cause browser to cache the page (at least for 
>>current browser session, close/reopen browser and pages are retrieved 
>>again - as expected).
>>
>>header('Last-Modified: '.date( 'r', 
>>filemtime($HTTP_SERVER_VARS['SCRIPT_FILENAME']) ));
>>
>>But scripts that call phplib's page_open function are not affected (ie: 
>>not cached) by this change?
>
>Put your header declaration *after* page_open() - the default PHP behavior 
>is to overwrite previously set headers of the same name. FWIW, when I send 
>an image file through a PHP script, I send the following headers, mainly 
>taken from session.inc:
>
>header("Expires: " . gmdate("D, d M Y H:i:s", time() + 1440 * 60) . " GMT");
>header("Last-Modified: " . gmdate("D, d M Y H:i:s", 
>filemtime("./logo.gif")) . " GMT");
>header("Cache-Control: public");
>header("Cache-Control: max-age=" . 1440 * 60, false);
>header("Pragma: public");
>
>HTH,
>Layne Weathers


If PHP overwrites headers with same name, how can your example have two 
"Cache-Control" headers?

Placing my "header" code after page_open didn't help.  I had a look at 
session.inc (phplib 7.2d) and thought that the following code should 
accomplish the intended result:
         class BK5_Session extends Session {
           var $classname  = "BK5_Session";
           var $that_class = "CT_Sql_BK5";
           var $allowcache = "private";
         }
But that didn't work either - pages are not being cached.