wp get post content by id

1$post_id = 5// example post id
2$post_content = get_post($post_id);
3$content = $post_content->post_content;
4echo apply_filters('the_content',$content);

1$my_postid = 12;//This is page id or post id
2$content_post = get_post($my_postid);
3$content = $content_post->post_content;
4$content = apply_filters('the_content', $content);
5$content = str_replace(']]>', ']]>', $content);
6echo $content;