php access以汉语言作为参数进行数据查询时出现乱码

<?php<br />
<br />
include_once("Conn.php");<br />
<br />
$testJSON=array();<br />
$str = trim($_GET['dept']);  <br />
<br />
$mysql ="  select *,0 as ord from checkpro where ifstop=0 and dept like '*".$str."*'  ";<br />
<br />
echo $mysql; <br />
 <br />
 $rs = $conn->Execute($mysql);<br />
 while(!$rs->EOF) <br />
            { 				<br />
<br />
	$mydept =iconv('gb2312','utf-8',$rs->Fields['dept']->Value);<br />
	$mypro =iconv('gb2312','utf-8',$rs->Fields['pro']->Value);<br />
	$mynote =iconv('gb2312','utf-8',$rs->Fields['note']->Value);<br />
	$mykf =iconv('gb2312','utf-8',$rs->Fields['kf']->Value);<br />
<br />
	echo $mydept;<br />
	<br />
    $testJSON[] = array('dept'=>"".$mydept."","pro"=>"".$mypro."","note"=>"".$mynote."","kf"=>"".$mykf."");   <br />
   	$rs->MoveNext();<br />
      }<br />
  <br />
 foreach ( $testJSON as $key => $value ) { <br />
 <br />
     foreach ( $testJSON[$key] as $key_k => $value_k ) { <br />
        $testJSON[$key][$key_k] = urlencode ($value_k);  <br />
	 }<br />
    }  <br />
   echo urldecode ( json_encode ( $testJSON ) );  <br />
<br />
         /*释放资源*/<br />
         $rs->Close();<br />
      $conn->Close();<br />
      $rs = null;<br />
      $conn = null;<br />
<br />
?>