<?php

// Best4u Similar Posts
function best4u_similar_posts($custom_post_type, $cuttom_taxonomy, $nr_posts) {
    global $post;
    $post_terms = array();
    $taxonomy = $cuttom_taxonomy;
    $terms = wp_get_post_terms($post->ID, $taxonomy);

    foreach ($terms as $term) {
        $post_terms[] = $term->term_id;
    }

    $posts_per_page = $nr_posts;
    $args = array(
        'posts_per_page' => $posts_per_page,
        'orderby' => 'date',
        'post_status' => 'publish',
        'post_type' => $custom_post_type,
        'post__not_in' => array($post->ID),
        'tax_query' => array(
            array(
                'taxonomy' => $taxonomy,
                'field' => 'id',
                'terms' => $post_terms
            ),
        )
    );
    $all_posts = new WP_Query($args);

    return $all_posts->posts;
}