Related posts both for regular posts and custom type posts

<?php
$post_type = get_post_type();
if($post_type == 'post') {
    $categories = get_the_category($post->ID);
} else {
    $taxonomy = get_object_taxonomies($post_type);
    $categories = get_the_terms( $post->ID, $taxonomy );
}
if ($categories) {
    if($post_type == 'post') {
        $category_ids = array();
        foreach($categories as $individual_category) { $category_ids[] = $individual_category->term_id; }
        $args = array( 'category__in' => $category_ids, 'post__not_in' => array($post->ID), 'posts_per_page' => 4, 'ignore_sticky_posts' => 1 );
    } else {
        foreach($categories as $term) { $post_tax = $term->taxonomy; }
        $args = array( 'post_type' => $post_type, "$post_tax" => $term->slug, 'post__not_in' => array($post->ID), 'posts_per_page' => 4);
    }
    $my_query = new wp_query($args);
    if( $my_query->have_posts() ) { ?>
        <div class="t4b_related_tips"> <!-- Related Post Start -->
            <div class="tips-head"><h2>এছাড়াও আপনি পছন্দ করতে পারেন</h2></div>
            <ul><?php
                while ($my_query->have_posts()) : $my_query->the_post(); ?>
                    <li><?php
                        if ( has_post_thumbnail() ) { ?>
                            <div class="tips-image"><a href="<?php the_permalink() ?>"><?php the_post_thumbnail('relatedpost-thumb'); ?></a></div><?php
                        } else { ?>
                            <div class="tips-image">
                                <a href="<?php the_permalink() ?>">
                                    <img src="<?php echo catch_that_image(); ?>" alt="tips4blog"/>
                                </a>
                            </div><?php
                        } ?>
                        <div class="tips-title"><h3><?php echo wp_trim_words( $post->post_title, 15, ' [...]' ); ?></h3></div>
                    </li><?php
                endwhile; wp_reset_query(); ?>
            </ul>
        </div> <!-- Related Post End --><?php
    }
}
?>