Php 尝试使用URLLoader将单个变量传递给Actionscript 3时出现错误#2007

我得到了TypeError:Error#2007:将变量从php传递到actionscript时，参数文本必须为非null

  import flash.events.MouseEvent;
  import flash.net.URLRequest;
  import flash.net.URLLoader;
  import flash.events.Event;

 stop();

 btn1.addEventListener(MouseEvent.CLICK, klik)
 function klik (e:MouseEvent):void
 {
var req:URLRequest = new URLRequest("http://localhost/GAME_FLASH/load.php");
var loader:URLLoader = new URLLoader(req);
loader.dataFormat = URLLoaderDataFormat.VARIABLES;
loader.addEventListener(Event.COMPLETE, complete);
 }

 function complete(e:Event):void
 {
test.text = e.target.data.$a;    => i think this is where my problem lies i got error #2007
 }

在我的php中：

 <?php
 $conn=mysql_connect("localhost","root","");

 $db=mysql_select_db("derbie",$conn);

 $query = "SELECT * FROM case"; 
 $result = mysql_query($query);
 $a=10;
 header('Content-Type: text/xml');
 echo "<?xml version='1.0' encoding='utf-8'?>\n";
 echo "<sock>\n";
  echo "<item>" . $a . "</item>\n";
  echo "</sock>\n";
  $closeconn = mysql_close($conn);
  ?>

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非常感谢您提供的任何帮助。

我建议您打开DevTools并检查php脚本的响应。这个回答可能是空的。 此外，将错误处理程序添加到加载程序中也非常有用