dongyue4964 2015-06-20 15:12
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使用AJAX定期调用PHP

I am trying to build a really simple web page that all it does is update the UI every second with a random number from PHP. I understand that I need to use AJAX but not familiar with it at all and could not figure out from all the research that I have done about it how to use it to accomplish my goal.

Here is my HTML/PHP file:

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <style>
      html, body, #map-canvas {
        height: 100%;
        margin: 0px;
        padding: 0px
      }
    </style>  
    <script src="//code.jquery.com/jquery-1.11.3.min.js"></script>
    <script src="//code.jquery.com/jquery-migrate-1.2.1.min.js"></script>
    <script type="text/javascript">
       $(function(){
          setInterval( function(){
              $.get("get_num.php", function(data) { 
                  $('#data').html(data);
              });
          }, 1000); 
       });
    </script>

  </head>
  <body>
     <?php include_once('get_num.php') ?>
    <div id="data"></div>
  </body>
</html>

get_num.php does nothing else but echo-ing a random number.

Any idea why this code is not updating my UI with the new number every second? Am I not using AJAX properly? What am I doing wrong here? Any help would be much appreciated.

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2条回答 默认 最新

  • dpsyssiv90846 2015-06-20 15:18
    关注

    The following code calls the get_num.php file

    setInterval(function() {
        $.get("get_num.php", function(data) {
        });
    }, 1000); 
    

    You need to add code within the line function (data) {} to handle the received data of the ajax call.

    This could be something like:

    setInterval(function() {
        $.get("get_num.php", function(data) {
            console.log(data);
            $("body").html(data);
        });
    }, 1000); 
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
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