Flex文件上传组件

<?php $errors = array(); $data = ""; $success = "false"; function return_result($success,$errors,$data) { echo("<?xml version=\"1.0\" encoding=\"utf-8\"?>"); ?> <results> <success><?=$success;?></success> <?=$data;?> <?=echo_errors($errors);?> </results> <? } function echo_errors($errors) { for($i=0;$i<count($errors);$i++) { ?> <error><?=$errors[$i];?></error> <? } } switch($_REQUEST['action']) { case "upload": $file_temp = $_FILES['file']['tmp_name']; $file_name = $_FILES['file']['name']; $file_path = $_SERVER['DOCUMENT_ROOT']."/myFileDir"; //checks for duplicate files if(!file_exists($file_path."/".$file_name)) { //complete upload $filestatus = move_uploaded_file($file_temp,$file_path."/".$file_name); if(!$filestatus) { $success = "false"; array_push($errors,"Upload failed. Please try again."); } } else { $success = "false"; array_push($errors,"File already exists on server."); } break; default: $success = "false"; array_push($errors,"No action was requested."); } return_result($success,$errors,$data); ?>