PHP上传进度条 - uploadprogress

PECL扩展模块 uploadprogress 下载 （ http://pecl.php.net/package/uploadprogress）

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
}