Is this design feasible?

??
I promise to post another problem I’m having, in just a few minutes!

Taken from e-sushi’s code, but UNTESTED, I think this will work for the left panel:

<ul>
<?php
   $mycategoryposts = get_posts('numberposts=-1&category=15');
   foreach($mycategoryposts as $post) {
?>
      <li><a href="<?php echo get_permalink() . '?myarticleid=' . $post->ID; ?>"><?php the_title(); ?></a></li>
   <?php } ?>
</ul

Then for the right panel:

<?php
   if (isset($_GET['myarticleid'])) {
      $postid = $_GET['myarticleid'];
   } else {
      $postid = 55; // The default post to show
   }
   $lastposts = get_posts("p=$postid");
      foreach($lastposts as $post) {
         setup_postdata($post);
         the_title(); the_date();
	     the_content();
      }
   }
?>

If i could suggest one small change..

$post = (int) $_GET['myarticleid'];

or

$post = intval( $_GET['myarticleid'] );

If you’re expecting an integer..

Thank you very much! Most helpful!

exciting.
I cant get the links open on the same page though, they keep opening on a “single” page…. hmm….
https://zetterstrand.com/category/articles/

I’m sorry. The left panel should get the permalink of the current page, not the permalink of the article.

<ul>
<?php
   $thispermalink = get_permalink();
   $mycategoryposts = get_posts('numberposts=-1&category=15');
   foreach($mycategoryposts as $post) {
?>
      <li><a href="<?php echo $thispermalink . '?myarticleid=' . $post->ID; ?>"><?php the_title(); ?></a></li>
   <?php } ?>
</ul

ah!
oh, but that does not work either…
https://zetterstrand.com/category/articles/

??
thanks for your efforts!

or should I save this template as ‘single.php’ so permalinks open in it?
but that would defeat the purpose….hm….

Do not save this as single.php – that will mess up other parts of the site.

Why is the permalink for the left links like this:

https://zetterstrand.com/2003/10/30/med-tydliga-forlagor/?myarticleid=293

It should be the same as the one used to get to the page:

https://zetterstrand.com/category/articles/?myarticleid=293

Perhaps you need to get the permalink to the current page earlier in the template. Without seeing more of the actual code, it is hard to tell.

Thanks, I will try to find a way to insert the correct code.

Meanwhile, I have made it work (!) by doing this tweak:

In ‘single.php’ i put:

<?php if ( in_category('15') ) { ?>
           //here i put all the code to make the category-15.php-page//
 <?php } else { ?>
           //here i put all the code to make the ordinary 'single.php'-page//
 <?php } ?>

It’s not pretty. What do you think? should I keep it like this? ??

I would not. Try hard-coding the link in the left panel to make sure it will work:

<ul>
<?php
   $thispermalink = 'https://zetterstrand.com/category/articles/';
   $mycategoryposts = get_posts('numberposts=-1&category=15');
   foreach($mycategoryposts as $post) {
?>
      <li><a href="<?php echo $thispermalink . '?myarticleid=' . $post->ID; ?>"><?php the_title(); ?></a></li>
   <?php } ?>
</ul

Thanks! I’ll try that!

Beautiful!

Glad it worked! Now, please use the dropdown at top right to mark this topic ‘Resolved’.

My sincerest thanks for all the help. That’s a wrap. I have a few other questions lining up, but i’ll take that in another thread.
!!!Gracias!!!