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: <[EMAIL PROTECTED]> > To: "Chris Shiflett" <[EMAIL PROTECTED]> > Cc: "Phil Powell" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>; > <[EMAIL PROTECTED]> > 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 <[EMAIL PROTECTED]> 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: 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 > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
![http://someurl.com/image.jpg?$rand"](http://someurl.com/image.jpg?$rand"){kind=link}