How to get rid of an empty loop without which nothing works?

Question

WordPress

I'm tagging posts.

<div class="portfolio-wrapper row j-center container">
  <?php 
$tags = get_the_tags();
foreach ( $tags as $tag ){
  
}
   $lastposts = get_posts( array(
  'numberposts' => -1,
  'tag' => $tag->slug,
  'category'    => 0,
  'orderby'     => 'menu_order',
  'order'       => 'DESC',
  'include'     => array(),
  'exclude'     => array(),
  'meta_key'    => '',
  'meta_value'  =>'',
  'post_type'   => 'portfolio',
  'suppress_filters' => true, // подавление работы фильтров изменения SQL запроса
) );
   foreach( $lastposts as $post ){ setup_postdata($post);
     ?>

  <div class="portfolio-item">
    <h2>
      <? the_title() ?>
    </h2>
    <a class="fancybox" rel="group" href="<?php the_post_thumbnail_url('large')?>">
      <img src="<?php the_post_thumbnail_url('medium')?>" alt="Фотография">
    </a>


  </div>

  <?php 
     
   }
   wp_reset_postdata()
   ?>
</div>
</div>

Nothing works without it

$tags = get_the_tags();
foreach ( $tags as $tag ){
  
}

But this is an empty loop, how can you get rid of this construction and why does it work like that?

Answer 1

The cycle matters because fills the $tag variable with the last element in the $tags array. And then in the following code, this variable is used like this - 'tag' => $tag->slug,
Try replacing the loop with an expression
$tag = array_pop($tags);