upload.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
  <![CDATA[
   private var fileR:FileReference=new FileReference()  
   /* 限制只能上传图片 */
   private var filet:FileFilter=new FileFilter("Images","*.jpg;*.png;*.gif")  
   private function browse():void{
    fileR.addEventListener(Event.Select,handSel)
   fileR.browse([filet])  
   }
   private function handSel(e:Event):void{
    filename.text=fileR.name
   }
   private function upload_():void{
    fileR.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA,handUpCom)
   var urlR:URLRequest=new URLRequest("http://localhost/upload1.php")
   fileR.upload(urlR)
   }
   private function handUpCom(e:DataEvent):void{
    tea.text=e.data as String  
   }
  ]]>
</mx:Script>
<mx:TextInput id="filename" x="10" y="10" fontSize="12"/>
<mx:Button x="178" y="10" label="浏览" fontSize="12"  click="browse()"/>
<mx:Button x="251" y="10" label="上传" fontSize="12" click="upload_()"/>
<mx:TextArea id="tea" x="10" y="93" width="478" height="238"/>
</mx:Application>



upload1.php

<?php
echo "\nReceiving upload...\n";
   echo "temporary file name = " . $_FILES['Filedata']['tmp_name']."\n";
   echo "file name = " . $_FILES['Filedata']['name']."\n";
   echo "file size = " . $_FILES['Filedata']['size']."\n";
   echo "move file...\n";
   move_uploaded_file($_FILES['Filedata']['tmp_name'], "upload/".$_FILES['Filedata']['name']);
   echo "file moved\n";
?>