Something

/** * PostModel */require_once 'models/PostModel.php';// insert a new post$post            = new PostModel();$post->title     = filter_input('title');$post->author    = filter_input('author');$post->timestamp = strtotime(filter_input('date'));$post->body      = filter_input('body');$post->save();unset($post);// update a post$post            = new PostModel();$post->post_id   = 5;$post->title     = filter_input('title');$post->author    = filter_input('author');$post->timestamp = time();$post->body      = filter_input('body');$post->save();unset($post);