Can't seem to get an else statement correct? [closed]

There is no while/else in PHP that I know of.

Second, I find “alternate” control structure syntax impossible to read, especially with two or three on the same line. Use brackets and properly indent your code. It will make a lot more sense.

<?php 
$tags = wp_get_post_tags($post->ID); if ($tags) { ?>
<h3>Related</h3>
<?php $first_tag = $tags[0]->term_id; $args=array(
    'tag__in' => array($first_tag),
    'post__not_in' => array($post->ID),
    'posts_per_page'=>10,
    'caller_get_posts'=>1
);?>
<ul><?php 
  $my_query = new WP_Query($args); 
  if( $my_query->have_posts() ) {
    while ($my_query->have_posts()) {
      $my_query->the_post(); ?>
      <li><h5><a href="https://wordpress.stackexchange.com/questions/105873/<?php the_permalink() ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></h5></li><?php 
    }
  } else { // this is where the else goes; after the have_posts conditional
    echo('no tags');
  }
  wp_reset_query(); ?>
</ul>

Noticed where I put the else. It follows the if($my_query->have_posts) conditional. If that condition is false your else should run, which sounds like what you want.

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