格式化excel文件问题

我有一个程序可以将文件转换为excel文件，但由于某种原因，我的电话和电子邮件字段被切换。它看起来像这个-

firstname   lastname    email   phone
test                            bi@gmail.com
test            d               813-767 leighmimail.com
test            Pds         888-413 Bperotects.com

电子邮件和电话应该切换

代码：

   <?php
session_start();
$num = $_SESSION['num'];
    $firstname =  $_SESSION['firstnameexport'];
    $lastname = $_SESSION['lastnameexport'];
    $email = $_SESSION['emailexport'];
    $phone = $_SESSION['phoneexport'];
    for($i =0; $i< $num; $i++){
    $data[$i] = array(
    "firstname" => $firstname[$i] , "lastname" => $lastname[$i], "email" => $email[$i], "phone" => $phone[$i]);
    }
function cleanData(&$str)
  {
    $str = preg_replace("/'t/", "''t", $str);
    $str = preg_replace("/'r?'n/", "''n", $str);
    if(strstr($str, '"')) $str = '"' . str_replace('"', '""', $str) . '"';
  }
// filename for download
  $filename = "website_data_" . date('Ymd') . ".xls";
  header("Content-Disposition: attachment; filename='"$filename'"");
  header("Content-Type: application/vnd.ms-excel");
  $flag = false;
  foreach($data as $row) {
    if(!$flag) {
      // display field/column names as first row
      echo implode("'t", array_keys($row)) . "'r'n";
      $flag = true;
    }
     array_walk($row, 'cleanData');
    echo implode("'t", array_values($row)) . "'r'n";
  }

unset($_SESSION['num'],$_SESSION['firstnameexport'],$_SESSION['lastnameexport'],$_SESSION['emailexport'],$_SESSION['phoneexport']);
?>

感谢您抽出时间！