在 PHP 5.4 中使用带有代码标志的会话上传进度条

参考本教程。使用 php 跟踪上传进度。我想让它在Codeigniter中工作。我没有开始让它在CI中工作。我想上传文件并跟踪进度。

在我的 CI 视图中

 <?php $arr = array("id"=>"myform");
       echo form_open_multipart("welcome/uploads",$arr); ?>
      <input type="hidden" value="myForm" name="<?php echo ini_get("session.upload_progress.name"); ?>">
      <table>
      <tr>
          <td>file</td>
         <td><input type="file" name="images[]" multiple></td>
     </tr>
     <tr>
         <td>name</td>
         <td><input type="text" name="naam"></td>
    </tr>
    <tr>
        <td></td>
        <td><input type="submit"></td>
    </tr>
</table>
<?php echo form_close(); ?>
<div id="bar_blank">

脚本

function toggleBarVisibility() {
  var e = document.getElementById("bar_blank");
  e.style.display = (e.style.display == "block") ? "none" : "block";
}

function createRequestObject() {
   var http;
   if (navigator.appName == "Microsoft Internet Explorer") {
       http = new ActiveXObject("Microsoft.XMLHTTP");
   }
   else {
      http = new XMLHttpRequest();
  }
     return http;
}

 function sendRequest() {
   var http = createRequestObject();
   http.open("GET", "<?php echo base_url().'index.php/welcome/progress' ?>");
   http.onreadystatechange = function () { handleResponse(http); };
   http.send(null);
 }

function handleResponse(http) {
   var response;
   if (http.readyState == 4) {
    response = http.responseText;
    document.getElementById("bar_color").style.width = response + "%";
    document.getElementById("status").innerHTML = response + "%";

    if (response < 100) {
        setTimeout("sendRequest()", 1000);
    }
    else {
        toggleBarVisibility();
        document.getElementById("status").innerHTML = "Done.";
      }
   }
}

 function startUpload() {
     toggleBarVisibility();
    setTimeout("sendRequest()", 1000);
 }

 (function () {
      document.getElementById("myForm").onsubmit = startUpload;  //error is here
})();

根据上面的教程，它在核心php中。当向控制器提交表单CI请求时，我的页面无论如何都会刷新。但在教程中，表单重定向到（相同的php文件）。我对此一无所知。请帮帮我。dashboard/addRoomPHP_SELF

控制器

 function progress()
    {
        session_start();

        $key = ini_get("session.upload_progress.prefix") . "myForm";
        if (!empty($_SESSION[$key])) {
            $current = $_SESSION[$key]["bytes_processed"];
            $total = $_SESSION[$key]["content_length"];
            echo $current < $total ? ceil($current / $total * 100) : 100;
        }
        else {
            echo 100;
        }
    }
    public function uploads()
    {
        if(!empty($_FILES['images']['name'][0]))
       {
        //uploadinf file code
       }
    }