Re: [PHP] cache control with javascript
On Mon, 20 Oct 2003 14:44:50 -0400 Joshua Minnie [EMAIL PROTECTED] wrote: Does anybody know how I can make force a javascript file (written in PHP) to be cached if the user agent allows it? Here is the situation: I am creating a dropdown menu system that contains a customer list, loaded from a database. This list is written to the javascript file for the menu. The menu can be quite large as the data grows. What I would like to do, is force it to be cached (unless of course the user agent doesn't allow it) so that it doesn't have to make the call to generate the file each time. What is the second it in the last sentence above? A browser wouldn't make the call to generate the javascript file each time. I have searched through the php.net website and even through the HTTP/1.1 protocols. I am continuing to look, but have not found a definite answer as to whether or not what I am trying to do is possible. Just make sure that the javascript is on a separate file (i.e. whatever.js) and that it's NOT being generated by your (php) script each time. Then, call that file from inside your html/php page. - E - __ Do You Yahoo!? Yahoo! BB is Broadband by Yahoo! http://bb.yahoo.co.jp/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] cache control with javascript
The it that you were asking about was the server. The javascript file is
actually a PHP file that produces the JavaScript that I need. I only have
one access to a database and a while loop to generate the code. Here is the
code pieces:
[code]
// already connected to the db
$sql = SELECT * FROM Customers ORDER BY LastName ASC, FirstName ASC;
$result = mysql_query($sql) or die(mysql_error());
while($row = mysql_fetch_assoc($result)) {
// generate the javascript
}
[/code]
The customer database can get potentially large so that this file could take
a while to generate. Currently there are only 300 records but I anticipate
many more. Does anyone have any recommendations that might speed this up?
Josh
- Edwin - [EMAIL PROTECTED] wrote:
Does anybody know how I can make force a javascript file (written in
PHP) to be cached if the user agent allows it?
Here is the situation:
I am creating a dropdown menu system that contains a customer list,
loaded from a database. This list is written to the javascript file
for the menu. The menu can be quite large as the data grows. What I
would like to do, is force it to be cached (unless of course the
user agent doesn't allow it) so that it doesn't have to make the
call to generate the file each time.
What is the second it in the last sentence above? A browser wouldn't
make the call to generate the javascript file each time.
I have searched through the php.net website and even through the
HTTP/1.1 protocols. I am continuing to look, but have not found a
definite answer as to whether or not what I am trying to do is
possible.
Just make sure that the javascript is on a separate file (i.e.
whatever.js) and that it's NOT being generated by your (php) script
each time. Then, call that file from inside your html/php page.
--
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Re: [PHP] cache control with javascript
On 2003.10.21, at 22:28 Asia/Tokyo, Joshua Minnie wrote: The it that you were asking about was the server. The javascript file is actually a PHP file that produces the JavaScript that I need. I only have one access to a database and a while loop to generate the code. Here is the code pieces: ...[snipped_code]... The customer database can get potentially large so that this file could take a while to generate. Currently there are only 300 records but I anticipate many more. Does anyone have any recommendations that might speed this up? Hmm... I think you missed the point earlier. Here's the basic idea. Create/generate a separate file (whatever.js) [1] and make sure that this file is ONLY *updated* when necessary (e.g. updated database)[2]. Call this file inside your HTML head tags. [3] This way, the whatever.js will be cached whenever possible. - E - [1] Check the file functions in the manual (if you're not familiar with it already). (http://www.php.net/manual/en/ref.filesystem.php) [2] Tip: Have a separate php script that generates the whatever.js. Use/run this script ONLY after you made an update to your database. [3] Something like this: head script src=/path/to/whatever.js language=javascript type=text/javascript/script /head __ Do You Yahoo!? Yahoo! BB is Broadband by Yahoo! http://bb.yahoo.co.jp/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] cache control with javascript
That really helped, I didn't think about generating the file that way. I have done other things like that, but sometimes it just helps when you get another set of eyes on the project at hand. Thanks for the refresher. Josh -Original Message- From: - Edwin - [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 21, 2003 11:56 AM To: Joshua Minnie Cc: [EMAIL PROTECTED] Subject: Re: [PHP] cache control with javascript On 2003.10.21, at 22:28 Asia/Tokyo, Joshua Minnie wrote: The it that you were asking about was the server. The javascript file is actually a PHP file that produces the JavaScript that I need. I only have one access to a database and a while loop to generate the code. Here is the code pieces: ...[snipped_code]... The customer database can get potentially large so that this file could take a while to generate. Currently there are only 300 records but I anticipate many more. Does anyone have any recommendations that might speed this up? Hmm... I think you missed the point earlier. Here's the basic idea. Create/generate a separate file (whatever.js) [1] and make sure that this file is ONLY *updated* when necessary (e.g. updated database)[2]. Call this file inside your HTML head tags. [3] This way, the whatever.js will be cached whenever possible. - E - [1] Check the file functions in the manual (if you're not familiar with it already). (http://www.php.net/manual/en/ref.filesystem.php) [2] Tip: Have a separate php script that generates the whatever.js. Use/run this script ONLY after you made an update to your database. [3] Something like this: head script src=/path/to/whatever.js language=javascript type=text/javascript/script /head __ Do You Yahoo!? Yahoo! BB is Broadband by Yahoo! http://bb.yahoo.co.jp/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Cache Control
Hi Jeroen, Where i can find more help about cache control Here: http://www.google.com/search?q=help+about+cache+control (495,000 results) Or did you mean something a bit more specific? Cheers Jon -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Cache Control
indeed more specific Jeroen At 11:00 31-5-2002 +0100, you wrote: Hi Jeroen, Where i can find more help about cache control Here: http://www.google.com/search?q=help+about+cache+control (495,000 results) Or did you mean something a bit more specific? Cheers Jon -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Cache Control
Hi Jeroen, Where i can find more help about cache control http://www.google.com/search?q=help+about+cache+control Or did you mean something a bit more specific? indeed more specific Well, seeing as you're not sharing the actual question with the mailing list, this answer may not be exactly what you're after, but it's probably: meta http-equiv=Pragma content=no-cache meta http-equiv=Cache-Control content=no-cache meta http-equiv=Expires content=?=$a_GMT_date_in_the_past? ;-) Cheers Jon -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Fwd: RE: [PHP] Cache Control
Date: Fri, 31 May 2002 12:13:40 +0200 To: Jon Haworth [EMAIL PROTECTED] From: Jeroen Timmers [EMAIL PROTECTED] Subject: RE: [PHP] Cache Control I want info on the internet where i can find a manuel. I want a statement that de page always refresh the page is a php script and sometimes it comes out of a proxy but that is not allowed. Thx Jeroen At 11:11 31-5-2002 +0100, you wrote: Hi Jeroen, Where i can find more help about cache control http://www.google.com/search?q=help+about+cache+control Or did you mean something a bit more specific? indeed more specific Well, seeing as you're not sharing the actual question with the mailing list, this answer may not be exactly what you're after, but it's probably: meta http-equiv=Pragma content=no-cache meta http-equiv=Cache-Control content=no-cache meta http-equiv=Expires content=?=$a_GMT_date_in_the_past? ;-) Cheers Jon -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Cache Control
Hi Jeroen, I want info on the internet where i can find a manuel. http://www.google.com/search?q=http+cache+control+headers the page is a php script and sometimes it comes out of a proxy but that is not allowed. It's not something you have absolute control over - some proxies are configured to ignore your caching instructions anyway. Cheers Jon PS. Please try and avoid using HTML mail on lists. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Cache Control with forms
Hi everyone! I have the following problem: I don't want any of my site's pages to be saved on any browser's cache. Yet, I want all HTML forms to keep their data when the user changes to another page without submiting and then comes back using the back button. I have seen changing the session.cache_limiter configuration option to 'private' instead of 'nocache' works to make all forms keep their data, but then all pages are diplayed from the browser's cache even after refreshing several times!. I want a point in between, but I don't know how to get there. By the way, do you know what do the values that session.cache_limiter can take mean? (nocache, private and public) When you set it to 'nocache' you get a set of HTTP headers that look like this: Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache That forces things to not be cached anywhere. The 'private' setting sends these headers: Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: private, max-age=10800, pre-check=10800 The expires header is set to a time in the past to force non-HTTP 1.1 compliant caches not to cache the page. For HTTP-1.1 caches that understand the cache-control header the page will be cached only in private caches (ie. the end-user http-1.1 compliant browser) for the time specified by the session.cache_expire setting. The 'public' setting sends headers like this: Expires: Thu, 19 Apr 2001 20:57:16 GMT Cache-Control: public, max-age=10800 Basically this means that the page is allowed to be cached in both public (like AOL's proxy-cache) and private caches for the time specified by session.cache_expire And no, I don't know of a way to do what you want. I don't think you can have the back button working and at the same time not allow private caching. -Rasmus -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
