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@NogDogOct 24.2010 — #You may want to set up an image file-server PHP script, via which you can then set any no-cache headers via the header() function.
Image would be accessed with something like:
Then image.php would be something like:
Alternatively, there's probably a way to set up a .htaccess file in the image directory to set the caching headers, but I'm too lazy to do the research on that for you. ?
I Can’t Find A Solution For This Problem …
Hi,
On my website I want to give users the option to rotate an image 90° by clicking a rotate-button. In the webbrowser I give the user feedback by rotating the image 90° and send the file ID of the particular image to the server (AJAX) where the actual image is rotated. Everything works fine, except when reloading the webpage, the webbrowser often shows the non-rotate version from its cache, instead of reloading the actual rotated file from the server.
I really would want this to work. Has anyone have any suggestions about how to solve this problem? I cannot rename the filename, because the url from other websites won’t work anymore …
Thanks in advance!
Christophe
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@NogDogOct 24.2010 — #You may want to set up an image file-server PHP script, via which you can then set any no-cache headers via the header() function.Image would be accessed with something like:
[code=php]
<?php
// example data:
$image_name = 'foo_bar.jpg';
?>
<img src='http://example.com/image.php?name=<?php echo urlencode($image_name); ?>' alt='' />
[/code]Then image.php would be something like:
[code=php]
$dir = "wherever/the/images/are/";
if(!empty($_GET['name'])) {
$name = basename($_GET['name']);
if(file_exists($dir.$name)) {
header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past
header("Content-Type: image/jpeg");
readfile($dir.$name);
exit;
}
}
header("Status: 404 Not Found");
?>
[/code]Alternatively, there's probably a way to set up a .htaccess file in the image directory to set the caching headers, but I'm too lazy to do the research on that for you. ?