程序需要php的apc模块的支持，关键点就是在上传的form里添加一个hidden的inpu标签，里面要有name为
APC_UPLOAD_PROGRESS的属性，value值为一个随机数一遍多个人上传。
apc模块的安装方法是，下载php_apc.dll放到ext文件夹下，在php.ini文件里添加
upload_max_filesize =100M
apc.rfc1867 = on
apc.max_file_size = 100M
extension=php_apc.dll
然后测试配置是否成功：
if(apc_fetch)
{echo "apc is working"}
else{echo "apc is not supported!";}
运行效果截图
下面是源码
1 前台页面：
<html>
<title>PHP+Ajax带进度条文件上传</title>
<head>
<style type="text/css">
#progress{
border:2px red solid;
width:200px;
height:20px;
display:none;
}
#pecent{
background-color:green;
display:block;
width:0px;
height:20px;
color:yellow;
}
</style>
</head>
<body>
<iframe style="display:none" name="ifm"></iframe>
<form enctype="multipart/form-data" method="POST" action="upload.php" target="ifm" name="myform">
<input type="hidden" name="APC_UPLOAD_PROGRESS" id="remark" >
<input type="file" name="upfile"/>
<input type="submit" value="上传" name="sub"/>
</form>
<div id="progress" class="before"><span id="pecent"></span></div>
<script type="text/javascript">
(function(){
function addEvent( node, type, listener ) {
if (node.addEventListener) {
// W3C method
node.addEventListener( type, listener, false );
return true;
} else if(node.attachEvent) {
// MSIE method
node['e'+type+listener] = listener;
node[type+listener] = function(){node['e'+type+listener]( window.event );}
node.attachEvent( 'on'+type, node[type+listener] );
return true;
}
// Didn't have either so return false
return false;
};
var submit=document.forms["myform"];
addEvent(submit,'submit',startUpload);
var begin;
var request;
var rdm;
var pec=document.getElementById("pecent");
function startUpload()
{
rdm=Math.floor(Math.random()*100000000);
document.getElementById('remark').setAttribute('value',rdm);
document.getElementById("progress").style['display']='block';
//creatXmlHttpRequest();
begin=setTimeout(doRequest,1000);
};
function creatXmlHttpRequest()
{
if(window.ActiveXObject)
{request=new ActiveXObject("Microsoft.XMLHTTP")}
else{request=new XMLHttpRequest();}
};
var count=0;
function doRequest()
{
if(window.ActiveXObject)
{request=new ActiveXObject("Microsoft.XMLHTTP");}
else{request=new XMLHttpRequest();}
if(request!=null){
request.onreadystatechange=handle;
request.open("GET","upload.php?key="+rdm+"&sim=" + (++count),true);
request.send();
}
};
function handle()
{
if(request.readyState==4&&request.status==200)
{
//接受服务器数据
var prgs=eval("(" + request.responseText + ")");
//var prgs=request.responseText;
var cur=parseInt(prgs.current);
var total=parseInt(prgs.total);
var pecentIs=Math.round(cur/total*100);
pec.innerHTML=pecentIs.toString()+"%";
if(100==pecentIs)
{
pec.style['width']="200px";
clearTimeout(begin);
}else{
begin=setTimeout(doRequest,1000);
//alert(pecentIs);
pec.style['width']=pecentIs*2;
}
}
};
})();
</script>
</body>
</html>
2后台upload.php文件代码：
<?php
/*
* Created on 2010-4-16
*
* To change the template for this generated file go to
* Window - Preferences - PHPeclipse - PHP - Code Templates
*/
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
$myfile=$_FILES['upfile'];
echo $myfile['size'];
echo $myfile['size'];
print_r($myfile);
$tempf=$myfile['tmp_name'];
$name=$myfile['name'];
move_uploaded_file($tempf,'up/'.$name);}
if(isset($_GET['key']))
{
//header('Content-Type:application/json; charset=utf-8' ) ;
// Retrieve the status using the getStatus() function below
//echo json_encode(getStatusAPC());
echo json_encode(getStatusAPC());
}
function getStatusAPC()
{
$response=false;
if($status = apc_fetch('upload_'.$_GET['key'])) {
$response=apc_fetch('upload_'.$_GET['key']);
}
return $response;
}
?>
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