PHP用反撇号执行外部命令_PHP

<&#63;php  
  #使用反撇号，暗示作为命令来执行
  $result=`date`;
  echo "<p>the server timestamp is: $result</p>";

  echo "<hr color=red>";
  #使用shell_exec()
  $result1=shell_exec("date");
  echo "<p>the server timestamp is: $result1</p>
                    <div class="aritcle_card">
                        <a class="aritcle_card_img" href="/ai/1695">
                            <img src="https://img.php.cn/upload/ai_manual/000/969/633/68b6d41e71b28517.png" alt="Natural Language Playlist">
                        </a>
                        <div class="aritcle_card_info">
                            <a href="/ai/1695">Natural Language Playlist</a>
                            <p>探索语言和音乐之间丰富而复杂的关系，并使用 Transformer 语言模型构建播放列表。</p>
                            <div class="">
                                <img src="/static/images/card_xiazai.png" alt="Natural Language Playlist">
                                <span>67</span>
                            </div>
                        </div>
                        <a href="/ai/1695" class="aritcle_card_btn">
                            <span>查看详情</span>
                            <img src="/static/images/cardxiayige-3.png" alt="Natural Language Playlist">
                        </a>
                    </div>
                ";
&#63;>