I want to post the reply content to Chatwork, but I can't get the new content with this code.

New topics can be sent to Chatwork.

I would like your advice.

function reply_message( $topic_or_post_id, $args ) {

    if(!get_option('post_cw_api_token') || !get_option('post_cw_roomid')) return;

    // Get post information from wpForo
    if(current_filter() === 'wpforo_after_add_topic'){
        $post = WPF()->topic->get_topic($topic_or_post_id);
    }else{
        $post = WPF()->post->get_post($topic_or_post_id);
    }

    $author_id = $post['userid']; // adjust this if 'userid' is not the correct key
    $author_name = get_the_author_meta('display_name', $author_id);

    $topic = wpforo_topic($post['topicid']);
    $topic_url = $topic['url'];

    $expert_num = get_option('post_send_cwr_expert');
    $send_title = esc_html( $post['title'] );

    $send_content = isset($post['topicid']) ? wp_strip_all_tags(wpforo_topic($post['topicid'], 'body')) : '';
    $send_content = mb_substr($send_content, 0, $expert_num);

    if (mb_strlen($send_content) >= $expert_num) {
        $send_content = mb_substr($send_content, 0, $expert_num - 3) . '...';
    }


    $body = '[info][title]' . get_option('post_send_cwr_messege') . '[/title]投稿者：' . $author_name . "\n[hr]\n"  . $send_title ."\n". $send_content . "\n" . $topic_url . '[/info]';

    $roomid = get_option('post_cw_roomid');
    $key = get_option('post_cw_api_token');
    $url = 'https://api.chatwork.com/v2/rooms/'.$roomid.'/messages';
    $data = array(
        'body' => $body
    );
    $headers = array(
        'Content-Type: application/x-www-form-urlencoded',
        'X-ChatWorkToken: '.$key
    );
    $options = array('http' => array(
        'method' => 'POST',
        'content' => http_build_query($data),
        'header' => implode("\r\n", $headers),
    ));
    $contents = file_get_contents($url, false, stream_context_create($options));
}