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@Koinelendot

It's a shame that a new version of Showkase has not yet been released with an implementation of the fix above but my code (from this post) is a complete solution to the problem with no known adverse side affects for those experiencing (or not experiencing) the problem.

Thank you for trying my suggestions.

This rules out a PHP version problem. (There are no known issues with Showkase v1.7.6 under PHP 8.0.)

That's odd but thanks for trying. I can't think of why this might be at the moment but at least we have this information that we can come back to if necessary.

Presumably all tests pass OK?

I've never encountered this myself. Unfortunately, the 'HTTP error' is most likely being generated by Plupload (the third-party upload module that Showkase uses) and it's rather generic and doesn't really help us to determine the cause of the problem.

This rules out the PHP 8.1 / 'thumbnail.php' problem (but changing to PHP 8.0 also rules this out).

Here are some more things to check and try:

(1) Make sure that your image filenames do not have any reserved or special characters in them. Try using only alpha-numeric characters (a-z, A-Z, 0-9) in your image filenames.

(2) Are your images rather large (in filesize)? Check your PHP directives post_max_size, upload_max_filesize and memory_limit to make sure that they are not set too low. Please check in with your web host if you are unsure where your PHP directives are set. (They might be set in a 'php.ini' file or you might be able to set them from within your hosting account's online control panel.)
Check out the description of post_max_size in the PHP documentation: https://www.php.net/manual/en/ini.core. … t-max-size
Here's a quote from the docs which might help you set these values:

The current PHP default values for post_max-size, upload_max_filesize and memory_limit are 8M, 2M and 128M respectively. Your web host might set other values as their own defaults.
Whatever your own current values are, try doubling them all (or even quadrupling them if they seem very low).

(3) Check your hosting account's control panel to see if there are any security modules installed which might be restricting the upload of images. Also, check any '.htaccess' files that you may be using to see if there are any entries there which might be causing problems.

Showkase works out-of-the-box on most web servers without any tweaking. Unfortunately, it appears that your web server might be a little too restrictive (at least at the moment) to allow Showkase to function correctly and fully.
I'll keep my fingers crossed that one of these new suggestions will point you in the right direction and that you will be able to resolve your problem.
As before, please let me know how you get on.
Thank you.

... and 2023.

I've tried to replicate the problem you reported (by publishing after sorting a ListViewer gallery by 'sort newest first', as seen in your screenshot) but I'm not encountering the error message myself.

First of all, you could try reinstalling Showkase v1.7.6 on top of your existing v1.7.6 installation .
Follow the upgrading instructions (https://showkase.net/support/upgrade/) but with the same version that you are currently using.
This will overwrite all Showkase source files with fresh versions, in case any of your existing source files have somehow become corrupt or gone missing.

Important Note:
You should not lose any custom content (pages or settings) doing this but it would be wise to make a complete backup of your existing site first, just in case anything unexpected should happen and you need to reinstate your original files at a later date.
Also, if you have made manual customizations to any Showkase source files or have used your theme's custom.css or custom.js files, then please note that these will be overwritten when you follow the upgrade process and you'll need a backup in order to reinstate them afterwards.

If this does not help, then in order to try to determine exactly which line of source code is triggering the error message, try running Showkase in debug mode (in case any more descriptive error messages are displayed in the Showkase status bar).
Open your 'showkase/admin/settings/constants.php' file in a plain text editor and change line 12 from:

define('DEBUG', false);

... to:

define('DEBUG', true);

The line number above refers to the current version of Showkase (v1.7.6).

Please let me know what new error messages (if any) are displayed in the Showkase status bar when you try to replicate the problem.

Also, please let me know what version of PHP you are running (in case it is relevant). I have been testing under PHP 8.1.21.

Hopefully this will resolve your problem or at least bring us one step closer to figuring it out.

I'm sorry to hear that you've run into a problem.
The problem is due to the use of PHP 8.1 or above (specifically, a PHP feature which Showkase makes use of but which was deprecated in PHP 8.1).

I've replied to another user who ran into this problem (relating to thumbnail dimensions) in this forum thread: https://showkase.net/forum/viewtopic.php?id=472

I noted a fix for the problem (which requires modifying a Showkase source file) here: https://showkase.net/forum/viewtopic.php?pid=2234#p2234

I've notified the developers and the fix should be incorporated into the next version of Showkase but I don't know when this might be.
In the meantime, I hope that you are able to implement the fix and that it resolves your issue.
Please let me know how you get on and if I can be of any further assistance.
Thank you and apologies for any inconvenience caused.

Sorry about that.
Maybe the email link is only visible to admins.
Mail me at Email address removed.

Every valid web page should have a <head> section but not every web page has a 'footer'.
Showkase pages do, indeed, have a <head> section but they also have a <header> and <footer>.

I expect when Google says that their code should go in the header and footer that the code should be placed at the top and bottom of the web page respectively (i.e. in the <head> section and just before the closing </body> tag at the very end of the web page).

If you need your code to be placed inside Showkase's own <header> and <footer> sections (which not all web pages will have), then you can insert the code just after the opening <header> tag or just before the closing </footer> tag in the layout.tpl file.

I think the <head> section and the bottom of the <body> section would be fine, though.

The CMS is "Showkase". (The big 3 CMSs are Drupal, Joomla and WordPress but you're using Showkase.)

Nice! I'm glad you've got the functionality you need.
Thanks for the update.

Good thinking! That'll work.

Yes, this theory does seem to make sense.

Not frowned upon... just not officially supported.
Having said that, if you really want a button to regenerate only images and don't want to create one yourself (I don't know how many source files would be involved) or wait to see if the developers introduce one, then you could maybe re-purpose the existing 'Rebuild' button to process only images by commenting out the lines of code which deal with regenerating the accompanying text files.

A couple of caveats:
(1) You'd no longer be able to use the 'Rebuild' button for its original purpose/full functionality.
(2) It would work only if no images are added to or removed from the gallery and if all filenames remain exactly the same. (I know you are aware of this. It's worth mentioning again, though, just in case anyone else is reading this.)

With this in mind, if you want to try it out, open your site's admin/commands/advanced.php file in a plain text editor and comment out (or remove) lines 77 to 86 (inclusive) and also lines 88 and 89. You can comment out lines of PHP code by adding // at the beginning, as follows:

// $page->gallery->saveGallery();
// Board::addMessage('Gallery xml file rebuilt');
// $pageSet->setPagesDataImageCount(
    // $pageIndex,
    // $page->getImageCount()
// );
// $pageSet->savePagesData();
// $pageSet->setPagesPref('publishing', 'unpublished');
// $pageSet->savePagesPrefs();
// Board::addMessage('Page data cache updated');

// $page->savePageHtml($pageSet, new Nav($pageFactory, $pageSet), new GalleryIndex($pageSet), new Smarty());
// Board::addMessage('Page html rebuilt');

Just re-upload the file after editing it (to its original location, overwriting the existing file). You might like to make a backup of the original file first (although you could always just extract the stock version of the file from the Showkase zip file if you need it).

This is untested and, being a source code modification, as far as I can take this in my capacity as official support.
I hope it points you in the right direction, though.

I've been trying to reproduce the problem you've described (rebuilding the gallery results in a random image order) but I've been unable to (on an Apache server).

I imported a Juicebox-Pro gallery with a custom image order and Showkase successfully imported the gallery and retained the custom image order and image titles and captions.

An initial 'Pages -> Edit Page -> Advanced -> Rebuild' rebuilt the gallery and changed the image order (to filename order) but retained image titles and captions.
All subsequent 'Pages -> Edit Page -> Advanced -> Rebuild' actions did not change anything at all.

I see your screenshots and don't doubt what you are experiencing but I don't know what's causing it.
I guess we're both using the same version of Showkase (v1.7.6) and you mentioned that you've seen the problem on an Apache server (which I was also using for testing) so other variables are the PHP installation/settings and the import gallery.

The import gallery shouldn't make a difference but if you like, you could send me the gallery (zip the gallery, upload the zip file somewhere and provide a link) and I'll try rebuilding it several times to see what happens. We should then perhaps be able to eliminate this from the equation (which would leave just PHP installation/settings as the main difference between your setup and mine).

My initial thought (regarding multi-threading) could still be possible but it's really difficult to troubleshoot an issue I can't reproduce.
I hope you can work around it.

Thank you for posting your request in the Feature Requests thread. I'm not the author of Showkase but the your request will definitely be seen by the developers over there.

To add images to any existing gallery page:

(1) Edit the gallery page from the 'Pages' tab.
(2) Go to the 'Upload' tab.
(3) Drag and drop your new images into the upload module (in HTML 5 mode).
(4) Click the 'Start Upload' button and wait for the images to finish uploading.
(5) Click 'Publish' (or add captions on the 'Images' tab or sort the images on the 'Sort' tab first if you like).

(The Library is really just for individual images that you might want to use for a site logo or add to a Basic page.)

I hope that helps.