flash + php 文件上传

 import flash.net.FileFilter;
import flash.net.FileReferenceList;
import fl.controls.Button;
import flash.events.MouseEvent;
import flash.events.Event;
import flash.events.ProgressEvent;
import flash.events.HTTPStatusEvent;
import flash.display.Loader;
import flash.net.URLRequest;
var choose_button:Button=new Button();
var upload_button:Button=new Button();
var loader:Loader=new Loader();
var reference_list:FileReferenceList=new FileReferenceList();
var url:URLRequest=new URLRequest("http://localhost/flashupload.php");
choose_button.label="选择文件";
upload_button.label="上传文件";

upload_button.move(100,50);
addChild(choose_button);
choose_button.move(300,100);
addChild(upload_button);
addChild(loader);
choose_button.addEventListener(MouseEvent.CLICK,choose_file);
upload_button.addEventListener(MouseEvent.CLICK,upload_start);
reference_list.addEventListener(Event.SELECT, selectHandle);
reference_list.addEventListener(Event.CANCEL, cancelHandle);
//reference_list.addEventListener(ProgressEvent.PROGRESS, progressHandler);
//reference_list.addEventListener(Event.COMPLETE, completeHandle);
//reference_list.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandle);
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,load_complete);

function progressHandler(evt:ProgressEvent):void{
trace("ProgressEvent");
trace(evt.target.name+"="+evt.bytesLoaded)
}

function load_complete(evt:Event):void{
trace("load_complete");
}

function selectHandle(evt:Event):void{
trace("select file successfully");
trace("你选择了"+evt.target.fileList.length+"文件")
for(var i:int=0;i<evt.target.fileList.length;i++){
trace(evt.target.fileList[i].name);
evt.target.fileList[i].addEventListener(ProgressEvent.PROGRESS, progressHandler);
evt.target.fileList[i].addEventListener(Event.COMPLETE, completeHandle);
evt.target.fileList[i].load();
}

//trace("type"+evt.target.fileList[