<?php
$categories = get_the_category($post->ID);
if ($categories) {
   $category_ids = array();
   foreach($categories as $individual_category) $category_ids[] = $individual_category->term_id;
 
   $args=array(
      'category__in' => $category_ids,
      'post__not_in' => array($post->ID),
      'showposts'=>3, // Gösterilecek benzer yazı sayısı
      'caller_get_posts'=>1,
      'orderby'=> 'rand'
   );
         
        $my_query = new wp_query($args);
   if( $my_query->have_posts() ) {

      while ($my_query->have_posts()) {
         $my_query->the_post();
      ?>