Re: Re: Cannot show reuploaded image file on page unless manual refresh

i think you missunderstood what I said. in the image tag that you create to display the image, you could do this <img src='/path/to/image/myfile.jpg?<?=filetime($filename)?>'> that would make the URL different when each page time the image was replaced. I would use filetime() because it would not cause extra downloads if the file wasn't different. if someone looked at the file 2 seconds apart and it didn't change, it was waisted time and bandwidth down loading the file again. Jim ----- Original Message ----- From: "Philip Hallstrom" <philip@adhesivemedia.com> To: <php-general@lists.php.net> Sent: Monday, January 20, 2003 4:11 PM Subject: [PHP] Re: Cannot show reuploaded image file on page unless manual refresh > I wonder if appending time() would be better... granular to a second and > you save the filesystem lookup effort?? > > On Mon, 20 Jan 2003, Jim Lucas wrote: > > > I would add the modification time of the file in question with > > > > filetime($filename); > > > > that way you will be sure to get a unique argurment. > > > > Jim > > > > ----- Original Message ----- > > From: <ed@home.homes2see.com> > > To: "Chris Shiflett" <shiflett@php.net> > > Cc: "Phil Powell" <soazine@erols.com>; <php-general@lists.php.net>; > > <talk@nyphp.org> > > Sent: Monday, January 20, 2003 10:48 AM > > Subject: Re: Cannot show reuploaded image file on page unless manual > > refresh > > > > > > > > > > Aha! Something I can chime in on. I happened across the same scenario a > > > few months back. The list helped me then so I'll give back. > > > > > > Call the image using a random identifier. > > > > > > $rand = rand(1000, 9999); > > > > > > echo "<img > > > src="http://someurl.com/image.jpg?$rand"; > > > > > > Since the browser will more than likely not have the image file identified > > > by the random number it must request it again from the server. Works > > > great where I need it! > > > > > > Ed > > > > > > On Mon, 20 Jan 2003, Chris Shiflett wrote: > > > > > > > --- Phil Powell <soazine@erols.com> wrote: > > > > > I am using the following header() functions to force > > > > > view.php to not cache: > > > > > > > > > > header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); > > > > > header("Last-Modified: " . gmdate("D, d M Y H:i:s") . > > > > > " GMT"); > > > > > header("Cache-Control: no-store, no-cache, > > > > > must-revalidate"); > > > > > header("Cache-Control: post-check=0, pre-check=0", > > > > > false); > > > > > header("Pragma: no-cache"); > > > > > > > > :-) > > > > > > > > I think you killed it. > > > > > > > > > However, when a user reuploads a file in manage.php, it > > > > > does a form post onto manage.php and reuploads the file > > > > > (which I verified works). However, when redirected via > > > > > header() to view.php, they still see their OLD image > > > > > file, NOT the new one! Unless I manually refresh the > > > > > page, they never see it, until they manually refresh the > > > > > page, then the new image file appears! > > > > > > > > Right. > > > > > > > > I think you are forgetting that the image is not really > > > > part of the PHP resource. Meaning, this is the series of > > > > events for a PHP script that refernces a single image > > > > called bar.jpg using the <img> tag: > > > > > > > > 1. HTTP request sent for foo.php (Web client -> Web server) > > > > 2. HTTP response sent that includes the output of foo.php > > > > (Web server -> Web client) > > > > 3. Web client (browser) notices <img> tag referenced in > > > > the HTML. > > > > 4. HTTP request sent for bar.jpg (Web client -> Web server) > > > > 5. HTTP response sent that includes bar.jpg > > > > > > > > So, the headers that you are setting only matter for the > > > > resource returned in step 2. Meaning, the HTML output of > > > > foo.php is not cached. The image, since it is returned by > > > > the Web server and not your PHP script, is cached. > > > > > > > > Chris > > > > > > > > -- > > > > PHP General Mailing List (http://www.php.net/) > > > > To unsubscribe, visit: Ÿr > > > > ëmÓ›{íæV¯åmhttp://www.php.net/unsub.php > > > > > > > > > > > > > -- > > > PHP General Mailing List (http://www.php.net/) > > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > > > > > > > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >