javascript - Ajax jquery load方法无法读取php中信息

<code>


    <meta charset="UTF-8">
    <title>Document</title>
    <script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
    <script>
        $(function (){
            $('#send').click(function() {
                $('#resText').load('demo.php');
            });
        })
    </script>


    <button id="send">点我点我点我</button>
    <div id="resText"></div>



</code>

<code><?php echo "dsjaflkasdj";
?>
</code>

<code>


    <meta charset="UTF-8">
    <title>Document</title>
    <script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
    <script>
        $(function (){
            $('#send').click(function() {
                $('#resText').load('demo.php');
            });
        })
    </script>


    <button id="send">点我点我点我</button>
    <div id="resText"></div>



</code>

<code><?php echo "dsjaflkasdj";
?>
</code>