php导出excel乱码

header("Content-type: application/vnd.ms-excel;");
header("Content-Disposition:filename=test.xls");

$datas = array(
        array('id'=>2,'email'=>'[email protected]','name'=>'aa'),
        array('id'=>4,'email'=>'[email protected]','name'=>'的决定咖啡店'),
        array('id'=>5,'email'=>'[email protected]','name'=>'CC'),
        array('id'=>7,'email'=>'[email protected]','name'=>'打开附件的客服金额看风景'),
        array('id'=>9,'email'=>'[email protected]','name'=>'ss')
        );
$table = "<table border='1'>";
$table .= "<tr>";
$table .= "<td>id</td><td>email</td><td>name</td>";
$table .= "</tr>";
foreach($datas as $key=>$value)
{
$table .= "<tr>";
$table .= "<td>".$value["id"]."</td>";
$table .= "<td>".$value["email"]."</td>";
$table .= "<td>".iconv("UTF-8", "gb2312",$value["name"])."</td>";
$table .= "</tr>";

}
$table .= "</table>";
echo $table;

设置charset也解决不了问题header("Content-type: application/vnd.ms-excel;charset=utf-8");

中文部分用iconv函数转换一下编码
浏览器默认编码是gb2312