ajax php上传文件,上传百分比

我使用iframe进行简单的ajax上传表单.我想要的是,加载消息显示上传百分比在< div id =“message”>< / div>

function start_Uploading(){
      document.getElementById('message').innerHTML = 'Uploading...';
      return true;
}

function stopUpload(success)
    {
      var result = '';
      if (success == 1)
        document.getElementById('message').innerHTML = 'Success';
      else 
         document.getElementById('message').innerHTML = 'Failed';
    }

这是形式

< div id="message"><br/></div>
< form action="upload.PHP" method="post" enctype="multipart/form-data" target="upload_target" onsubmit="start_Uploading();" >
    File:< input name="myfile" type="file" size="30" />
    < input type="submit" name="submitBtn" value="Upload" />
    < br/>< iframe id="upload_target" name="upload_target" src="#" style="width:0;height:0;border:0px solid #fff;"></iframe>
</form>

服务器端upload.PHP 文件是

$destination_path = getcwd().DIRECTORY_SEParaTOR;
   $result = 0;
   $target_path = $destination_path . basename( $_FILES['myfile']['name']);
   if(@move_uploaded_file($_FILES['myfile']['tmp_name'], $target_path))
      $result = 1;
   sleep(1);
   echo "<script language=\"javascript\" type=\"text/javascript\">window.top.window.stopUpload($result);</script>";

解决方法:

两件事情：

>使用Javascript
>使用APC

使用Javascript：

You can use plupload (http://www.plupload.com/) 
- pretty good multiple file uploader

Pretty decent JS plugin for uploading files in PHP in two methods, 
1. normal upload 
2. chunk based uploading.

限制/假设：

1. Flash Plugin - in the browser
2. Session problem - since it's flash, a different session's are created for 
   each file upload.

APC / PHP

使用APC – 您可以自己创建一个进度条.

限制/假设：

1. Install APC on the server - using PECL (pecl install APC)
2. Write a separate code to get the status of upload.

码：

getprogress.PHP

<?PHP
if(isset($_GET['progress_key'])) {

$status = apc_fetch('upload_'.$_GET['progress_key']);
echo $status['current']/$status['total']*100;

}
?>

upload.PHP的

<?PHP
$id = uniqid("");
?>
<html>
<head><title>Upload Example</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
</head>
<body>

<script type="text/javascript">
function getProgress(){
$.get("getprogress.PHP?progress_key=<?PHP echo($id)?>", 
           function(percent) {
               document.getElementById("progressinner").style.width = percent+"%";
               if (percent < 100){
                    setTimeout("getProgress()", 100);
               }
           });

}

function startProgress(){
   document.getElementById("progressouter").style.display="block";
   setTimeout("getProgress()", 1000);
}

</script>

<iframe id="theframe" name="theframe" 
    src="fileupload.PHP?id=<?PHP echo($id) ?>" 
    style="border: none; height: 100px; width: 400px;" > 
</iframe>
<br/><br/>

<div id="progressouter" style="width: 500px; height: 20px; border: 6px solid red; display:none;">
<div id="progressinner" style="position: relative; height: 20px; background-color: purple; width: 0%; ">
</div>
</div>

</body>
</html>

fileupload.PHP

<?PHP
$id = $_GET['id'];
?>

<form enctype="multipart/form-data" id="upload_form" 
  action="target.PHP" method="POST">

<input type="hidden" name="APC_UPLOAD_PROGRESS" 
   id="progress_key"  value="<?PHP echo $id?>"/>

<input type="file" id="test_file" name="test_file"/><br/>

<input onclick="window.parent.startProgress(); return true;"
type="submit" value="Upload!"/>

</form>

ajax php上传文件,上传百分比

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