wp_back/wp-content/themes/simple-theme/api-posts/api-posts.php

<?php

add_action('rest_api_init', 'endlessPosts');

function endlessPosts()
{
 register_rest_route('api-posts/v1', "/endlessPosts", array(
    'methods' => WP_REST_Server::READABLE,
    'callback' => 'getEndlessPostsResults'
 ));
}

function getEndlessPostsResults($data)
{
    global $wpdb;

    $link = $data['permalink'];
    $paged = $data['paged'];

    if ($paged < 0){
        $paged = 1;
    }

    $result = [];

    $tag_slug = url_to_postid($link); //Получаем айди поста по пермалинку
    $tags = get_the_tags($tag_slug); //Получаем тэги по айди
    $i = 0;
    $postSlugs = [];

    if  (!$tags){
        $tags = 'null';
    }

    if (is_array($tags) && count($tags) > 0) {
        $postSlugs = array_column($tags, 'term_id');
    } else {
        // Handle the case when no tags are found
        $postSlugs = array(); // or some other default value
    }

    $id_from_permalink = explode('/', $link);
    $id_from_permalink = explode('-', $id_from_permalink[3]);

    $id = $id_from_permalink[0];

    $requestedPostFromPermalink = get_post($id);

    $requestedPost = [
        'id' => $requestedPostFromPermalink->ID,
        "post_author" => $requestedPostFromPermalink->post_author,
        "post_date" => $requestedPostFromPermalink->post_date,
        "post_date_gmt" => $requestedPostFromPermalink->post_date_gmt,
        "post_content" => $requestedPostFromPermalink->post_content,
        "post_title" => $requestedPostFromPermalink->post_title,
        "post_excerpt" => $requestedPostFromPermalink->post_excerpt,
        "post_status" => $requestedPostFromPermalink->post_status,
        "comment_status" => $requestedPostFromPermalink->comment_status,
        "ping_status" => $requestedPostFromPermalink->ping_status,
        "post_password" => $requestedPostFromPermalink->post_password,
        "post_name" => $requestedPostFromPermalink->post_name,
        "to_ping" => $requestedPostFromPermalink->to_ping,
        "pinged" => $requestedPostFromPermalink->pinged,
        "post_modified" => $requestedPostFromPermalink->post_modified,
        "post_modified_gmt" => $requestedPostFromPermalink->post_modified_gmt,
        "post_content_filtered" => $requestedPostFromPermalink->post_content_filtered,
        "post_parent" => $requestedPostFromPermalink->post_parent,
        "guid" => $requestedPostFromPermalink->guid,
        "menu_order" => $requestedPostFromPermalink->menu_order,
        "post_type" => $requestedPostFromPermalink->post_type,
        "post_mime_type" => $requestedPostFromPermalink->post_mime_type,
        "comment_count" => $requestedPostFromPermalink->comment_count,
        "filter" => $requestedPostFromPermalink->filter,
    ];

    $result[] = ['requested-post' => $requestedPost];




    $args = array( // Создаем массив с параметрами запроса
        'tag__and' => $postSlugs,
        'posts_per_page' => 10,
        'paged' =>$paged,
        'orderby'=>'date',
        'order'=> 'DESC'
    );

    $posts = new WP_Query($args); // Инициализация запроса
    while ( $posts->have_posts() ) {
        $posts->the_post();
        $result[] = array(
            'id' => get_the_ID(),
            'permalink' => get_the_permalink(),
        );
    }

    return $result;
}

//"http://pamtest.ru/702-oformlenie-osago-na-a-b-c-d-otkryto-vsem-agenta/"

//"http://pamtest.ru/294-6-j-urok-kak-strahovomu-agentu-zadavat-voprosy-i-rabotat-s-vozrazheniyami/"