Flex PHPサービスでパラメータint []を指定するにはどうすればいいですか

Question

私のFlexサービスコールはNULLを返しています。

データベース：

user_id: 1 
user_name: stephen 
user_password: qwerty 
status: Active 

user_id: 2 
user_name: john 
user_password: qwerty 
status: Passive 

user_id: 3 
user_name: marice 
user_password: qwerty 
status: Awaiting 

user_id: 4 
user_name: maria 
user_password: qwerty 
status: Passive 

PHPサービス方法：

public function getAllUserByStatus($arrStatus) { 

    $rows = array(); 

    foreach ($arrStatus as $item) 
    { 
     $stmt = mysqli_prepare($this->connection, "SELECT * FROM $this->tablename WHERE status=?");  
     $this->throwExceptionOnError(); 

     mysqli_stmt_bind_param($stmt, 's', $item);  
     $this->throwExceptionOnError(); 

     mysqli_stmt_execute($stmt); 
     $this->throwExceptionOnError(); 

     mysqli_stmt_bind_result($stmt, $row->user_id, $row->user_name, $row->user_password, $row->status); 

     while (mysqli_stmt_fetch($stmt)) { 
      $rows[] = $row; 
      $row = new stdClass(); 
      mysqli_stmt_bind_result($stmt, $row->user_id, $row->user_name, $row->user_password, $row->status); 
     } 

     mysqli_stmt_free_result($stmt); 
    } 

    mysqli_close($this->connection); 
    return $rows; 
} 

PHPクエリのテスト：

<?php 
    include('UserService.php'); 
    $o = new UserService(); 
?> 

<pre> 
<?php 
    var_dump($o->getAllUserByStatus(array('Active','Passive'))); 
?> 
</pre> 

PHPのテスト結果：

array 
    0 => 
    object(stdClass)[4] 
     public 'user_id' => int 1 
     public 'user_name' => string 'stephen' (length=7) 
     public 'user_password' => string 'qwerty' (length=6) 
     public 'status' => string 'Active' (length=6) 
    1 => 
    object(stdClass)[5] 
     public 'user_id' => int 2 
     public 'user_name' => string 'john' (length=4) 
     public 'user_password' => string 'qwerty' (length=6) 
     public 'status' => string 'Passive' (length=7) 
    2 => 
    object(stdClass)[3] 
     public 'user_id' => int 4 
     public 'user_name' => string 'maria' (length=5) 
     public 'user_password' => string 'qwerty' (length=6) 
     public 'status' => string 'Passive' (length=7) 

のFlexアプリケーションは（なぜ、nullを返します）：

<?xml version="1.0" encoding="utf-8"?> 
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
       xmlns:s="library://ns.adobe.com/flex/spark" 
       xmlns:mx="library://ns.adobe.com/flex/mx" 
       xmlns:userservice="services.userservice.*" 
       minWidth="955" minHeight="600"  creationComplete="application1_creationCompleteHandler(event)"> 
    <fx:Script> 
     <![CDATA[ 
      import mx.collections.ArrayCollection; 
      import mx.controls.Alert; 
      import mx.events.FlexEvent; 
      import mx.rpc.events.ResultEvent; 

      protected var acUser:ArrayCollection; 

      protected function application1_creationCompleteHandler(event:FlexEvent):void 
      { 
       getAllUserByStatusResult.token = userService.getAllUserByStatus(new ArrayCollection(new Array(['Active','Passive']))); 
       getAllUserByStatusResult.addEventListener(ResultEvent.RESULT, getAllUserByStatusResultHandler); 
      } 

      protected function getAllUserByStatusResultHandler(event:ResultEvent):void 
      { 
       acUser = event.result as ArrayCollection; 

       // Break Point to examine acUser 
     } 

     ]]> 
    </fx:Script> 
    <fx:Declarations> 
     <s:CallResponder id="getAllUserByStatusResult"/> 
     <userservice:UserService id="userService" fault="Alert.show(event.fault.faultString + '\n' + event.fault.faultDetail)" showBusyCursor="true"/> 
     <!-- Place non-visual elements (e.g., services, value objects) here --> 
    </fx:Declarations> 
</s:Application> 

Answer 1

event.resultがArrayCollectionのない場合は、1にキャストしようとしていることがちょうどヌル割り当てにつながります。 acUserをArrayのインスタンスにして、event.resultをそのインスタンスにキャストしてみてください。