How to show name of tag+tag

global $wp_query;
$tags = $wp_query->get('tag');
echo "Posts with tags: $tags";

$tags will be something like “books+romance”, so you might want to string replace “+” with “, ” or similar before echoing out. This outputs the tag slugs. if you want the tag names, you’ll have to get each tag’s WP_Term object in turn, from which the tag name is available.

Hi bcworkz! Thanks for your reply and the explaination, but I thought it would easier to achieve because I’m unfortunately not a coder (but I’m willing to learn) <:)

Since WordPress supports multiple tag queries (in my case: https://www.mydomain.com/tag/books+romance/) I thought there was a ‘WordPress built-in’ way to show both tag names and not only the first one of them (in this case, Books).

I tried to add the query you posted but it breaks my page… Could you please provide a more detailed or an easier way to do it? Thanks for your help! ??

My code works as expected on my site. My theme uses archive.php for such queries, YMMV. Be sure where you place the code is within a <?php ?> block, but be sure such blocks are not nested within another. If it’s among other PHP code, be sure the code is inserted on new lines after a terminal ; of other code.

What I did with templates is copy archive.php from my parent theme (twentytwentyone) to my child theme, renaming it tag.php so it is only used for tag requests. I replaced this line with my code:
the_archive_title( '<h1 class="page-title">', '</h1>' );
and placed those same h1 tags on either side of my code, but outside of the `<?php ?> block. So

<h1 class="page-title">
<?php
global $wp_query;
$tags = $wp_query->get('tag');
echo "Posts with tags: $tags";
?>
</h1>

Awesome, thank you very much bcworkz, it works perfectly! ??