function reading_time() {

  $content = get_post_field('post_content', $post->ID);

  $word_count = str_word_count(strip_tags( $content));

  $readingtime = ceil($word_count / 200);

  if ($readingtime === 1) {
    $timer = " minute";
  } else {
    $timer = " minutes";
  }

  $totalreadingtime = $readingtime . $timer;

  echo $totalreadingtime;
}