核心提示：目前我知道的方法有两种，一种是使用PHP的创始人 Rasmus Lerdorf 写的APC扩展模块来实现，另外一种方法是使用PECL扩展模块uploadprogress实现。
目前我知道的方法有两种，一种是使用PHP的创始人 Rasmus Lerdorf 写的APC扩展模块来实现（http://pecl.php.net/package/apc），另外一种方法是使用PECL扩展模块uploadprogress实现（http://pecl.php.net/package/uploadprogress）我这里举两个分别实现的例子供参考，更灵活的应用根据自己需要来修改。
APC实现方法：
安装APC，参照官方文档安装，可以使用PECL模块安装方法快速简捷，这里不说明
配置php.ini，设置参数 apc.rfc1867=1 ，使APC支持上传进度条功能，在APC源码说明文档里面有说明
代码范例：
if ($_SERVER['REQUEST_METHOD'] == ‘POST‘) { //上传请求 $status = apc_fetch(‘upload_‘ . $_POST['APC_UPLOAD_PROGRESS']); $status['done'] = 1; echo json_encode($status); //输出给用户端页面里的ajax调用，相关文档请自己寻找 exit; } elseif (isset($_GET['progress_key'])) { //读取上传进度 $status = apc_fetch(‘upload_‘.$_GET['progress_key']); echo json_encode($status); exit; } else { //其他代码，比如上传表单等 } |
uploadprogress 模块实现方法：
使用PECL模块安装方法安装该模块
php.ini里面设置 uploadprogress.file.filename_template = “/tmp/upd_%s.txt”
代码范例：
if($_SERVER['REQUEST_METHOD']==‘POST‘) { if (is_uploaded_file($_FILES['upfile']['tmp_name'])) { $upload_dir = ‘your_path/‘; $ext = strrchr($_FILES['video']['name'], ‘.‘); $sessid = $_POST['UPLOAD_IDENTIFIER'] ; $tmpfile = $upload_dir . $sessid; $sessfile = $upload_dir . $sessid .$ext; if (move_uploaded_file($_FILES['upfile']['tmp_name'],$tmpfile)) { //上传成功 } else { //上传失败 } else { //上传错误 } elseif (!empty($_GET['sessid'])) { header(“Expires: Mon, 26 Jul 1997 05:00:00 GMT“); header(“Last-Modified: “ . gmdate(“D, d M Y H:i:s“) . “ GMT“); header(“Cache-Control: no-store, no-cache, must-revalidate“); header(“Cache-Control: post-check=0, pre-check=0“, false); header(“Pragma: no-cache“); header(“Content-Type:text/html;charset=UTF-8“); $unique_id = $_GET['sessid']; $uploadvalues = uploadprogress_get_info($unique_id); if (is_array($uploadvalues)) { echo json_encode($uploadvalues); } else { //读取进度失败，另外处理逻辑 } } else { //显示上传表单 } |
这两天研究了下，PHP上传进度条的问题，就用了其中的一种方法：借用apc的扩展；
1.APC扩展库的安装(windows);
(1)首先下载php_apc.dll，然后再php.ini里配置：在扩展库后加(;extension=php_zip.dll)->
extension=php_apc.dll
apc.rfc1867=1
apc.cache_by_default =Off
apc.enable_cli =Off
apc.enabled =On
apc.file_update_protection =2
apc.filters =""
apc.gc_ttl =3600
apc.max_file_size =200M
apc.num_files_hint =1000
apc.optimization =On
apc.shm_segments =1
apc.shm_size =30
apc.slam_defense =Off
apc.stat =On
apc.ttl =0
apc.user_entries_hint =100
apc.user_ttl
(2)把php_apc.dll复制到c盘windows文件夹下
(3)重启apache，测试有没安装成功！
if(function_exists("apc_fetch")){
echo "安装成功！";
}
else
{
echo "安装失败，请重新安装！";
}
2.把相关的代码贴上
(1)getprogress.php
<?php
session_start();
if(isset($_GET['progress_key'])) {
$status =apc_fetch('upload_'.$_GET['progress_key']);
echo ($status['current']/$status['total'])*100;
}
?>
(2)upload.php
<style type="text/css">
*{margin:0px;padding:0px;}
</style>
<?php
$id = $_GET['id'];
if($_GET["add"]=="ok")
{
echo "上传成功！";
}
else{
?>
<form enctype="multipart/form-data" id="upload_form" action="target.php" name="upload_form" 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" οnchange="window.parent.startProgress();" style="width:190px;height:20px; background-color:gray;"/><br/>
</form>
<?php
}
?>
(3)progress.php
<?php
$id = md5(uniqid(rand(), true));
?>
<html>
<head><title>php文件上传进度</title></head>
<body>
<script type="text/javascript">
var xmlHttp;
var proNum=0;
var loop=0;
var Try = {
these: function() {
var returnValue;
for (var i = 0; i < arguments.length; i++) {
var lambda = arguments[i];
try {
returnValue = lambda();
break;
}
catch (e) {}
}
return returnValue;
}
}
function createXHR(){
return Try.these(
function() {return new XMLHttpRequest()},
function() {return new ActiveXObject('Msxml2.XMLHTTP')},
function() {return new ActiveXObject('Microsoft.XMLHTTP')}
) || false;
}
var xmlHttp;
function sendURL() {
xmlHttp=createXHR();
var url="getprogress.php?progress_key=<?php echo $id;?>";
xmlHttp.onreadystatechange=doHttpReadyStateChange;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}
function doHttpReadyStateChange() {
if (xmlHttp.readyState == 4){
proNum=parseInt(xmlHttp.responseText);
document.getElementByIdx_x("progressinner").style.width = proNum+"%";
document.getElementByIdx_x("showNum").innerHTML = proNum+"%";
if (proNum<100){
setTimeout("getProgress()",500);
}
else
{
window.theframe.location.href='upload.php?add=ok';
}
}
}
function getProgress(){
loop++;
document.getElementByIdx_x("showNum2").innerHTML = loop;
sendURL();
}
function startProgress(){
document.getElementByIdx_x("progressouter").style.display="block";
setTimeout("getProgress()",500);
window.theframe.upload_form.submit();
}
</script>
<iframe id="theframe" name="theframe" src="upload.php?id=<?php echo($id); ?>" style=" height:20px; width: 190px;" frameborder="0" scrolling="no">
</iframe>
<div id="progressouter" style="font-size:0px;width:300px;height:5px;border: 1px solid red;display:none;">
<div id="progressinner" style="font-size:0px;position: relative; height:5px; background-color: purple; width:0%;">
</div>
</div><div id='showNum'></div><br>
<div id='showNum2'></div>
</body>
</html>
(4)target.php
<?php
set_time_limit(600);
if($_SERVER['REQUEST_METHOD']=='POST') {
move_uploaded_file($_FILES["test_file"]["tmp_name"],dirname($_SERVER['SCRIPT_FILENAME'])."/upload/" . $_FILES["test_file"]["name"]);//UploadTemp文件夹位于此脚本相同目录下
}
?>
3.打开progress.php进行测试，可以把源码修改成更好的！
