I found a plugin:backlinks but I have to add a syntax in every page, which is not that convenience. Is there a way to simply add a plugin (or modify some .php files) to show all backlinks in every page instead of a button to them? Thank you
You might consider using namespace templates for new pages and the batchedit plugin to add that syntax to all existing pages.
Maybe this plugin: https://www.dokuwiki.org/plugin:footer ? It is supposed to work with any wiki syntax (I didn't test this.)
Could you try to add codes below to between tpl_content() and tpl_includeFile('pagefooter.html') in main.php of your template folder?
tpl_content()
tpl_includeFile('pagefooter.html')
<section> <?php (new \dokuwiki\Ui\Backlinks)->show(); ?> </section>
