I'd like to display some information inside a div on the single posts written by some authors. For exemple, author ID 15 has 100 posts. I'd like to display some information on that post pages, just below the header. I've tried this but it didn't work.
<?php if ( is_author( '15' ) ) : ?>
<div class="specialist"><img src="https://xxxxxx.com.br/wp-content/uploads/2019/11/xxxx.png" /> Specialist: <?php the_author_posts_link(); ?></div>
<?php endif; ?>
is_author() isn't working as you expect because it checks whether the current query is for an existing author archive page.
If you're placing your code in single.php inside the loop, you can use this instead:
<?php if( $post->post_author == '15' || $post->post_author == '16' ) { ?>
<div>Your code here</div>
<?php } ?>
single.php or similar. PHP doesn't run in the editor (wp-admin) for security reasons.
Commented
Dec 5, 2019 at 20:44
single.php file if it's a custom theme or you've already created a child theme. If you just edit a theme, and later update that theme, your changes will be overwritten. By putting your edits in a child theme instead, your edits stay in place even when the parent theme gets updated.
Commented
Dec 5, 2019 at 21:53
<?php if ( $post->post_author == '15' || '14' ) { ?> <div class="123-mbf"><img src="https://123.com/wp-content/uploads/2019/11/123.png"> Specialist: <?php the_author_posts_link(); ?></div> <?php } ?> I'd want that the information is displayed on posts from authors 14 and 15.
Commented
Dec 5, 2019 at 22:10