สอบถามเรื่องการ export excel จากหน้าที่เราทำการค้นหา

if(isset($_GET['type'])=="xls")
{
$filename = $class_name;
header("Content-Type: application/x-msexcel");
header("content-disposition: attachment;filename=$filename.xls");
echo "<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>";
}

<?php 
$hostname_connection = "localhost"; 
$database_connection = "dbname"; 
$username_connection = "root"; 
$password_connection = "123456"; 
 
$connection = mysql_pconnect($hostname_connection, $username_connection, $password_connection) or trigger_error(mysql_error(),E_USER_ERROR); mysql_query("SET NAMES UTF8") ;
 
mysql_select_db($database_connection, $connection); 

$startDate = date('Y-m-d', strtotime($_POST['search_start']));
$endDate = date('Y-m-d', strtotime($_POST['search_end']));
 
$query_rs_report_order_detail = "SELECT record.*, register.Emp_Name, department.Dep_Name, leave_type.Leave_Name, SUM(Rec_Day), SUM(Rec_Hour) FROM record inner join register on record.Emp_ID=register.Emp_ID inner join department on register.Dep_ID=department.Dep_ID inner join leave_type on leave_type.Leave_ID=record.Rec_Type where (( Date_start between '".$startDate."' and '".$endDate."') and (Date_end between '".$startDate."' and '".$endDate."' )) GROUP BY emp_id, Rec_Type ORDER BY record.Emp_ID ASC";
$rs_report_order_detail = mysql_query($query_rs_report_order_detail, $connection) or die(mysql_error()); 
$row_rs_report_order_detail = mysql_fetch_assoc($rs_report_order_detail); 
$totalRows_rs_report_order_detail = mysql_num_rows($rs_report_order_detail);
?>

        <form name="form1" method="post" action="">
          <p>&nbsp;</p>
          <p><BR>
            <BR>
          </p>
          <h4><img src="image/report.jpg" width="45" height="35"> รายงานสรุปวันลาพนักงานระหว่างวันที่ <U>"<?PHP echo"<font color=\"blue\">$search_start</font>";?>"</U> ถึง <U>"<?PHP echo"<font color=\"blue\">$search_end</font>";?>"</U></h4>
          <form name="form1" method="post" action="">
            ระหว่างวันที่ 
            <input type="text" name="search_start" id="search_start">
          ถึง 
          <input type="text" name="search_end" id="search_end">
          <input type="submit" name="button" id="button" value="ตกลง">
          <br>
          <br>
          </form>
<table border="1" >
          <tr>
            <td width="141" height="34"bgcolor="#CCCCCC"><B><center>รหัสพนักงาน<br></center></B></td>
            <td width="168" bgcolor="#CCCCCC"><B><center>ชื่อ-นามสกุล<br></center></B></td>
            <td width="175" bgcolor="#CCCCCC"><B><center>แผนก<br></center></B></td>
            <td width="172" bgcolor="#CCCCCC"><B><center>ประเภทการลา<br></center></B></td>
            <td width="117" bgcolor="#CCCCCC"><B><center>จำนวนวัน</center></B></td>
            <td width="112" bgcolor="#CCCCCC"><B><center>จำนวนชั่วโมง</center></B></td>
          </tr>
 
<?php 
do { 
 
	$iLoop = ($old_record == $row_rs_report_order_detail['Emp_Name'])? $iLoop : ++$iLoop ; 
	$bgcolor = (($iLoop%2)==0)?"#FFFFFF":"#EEEEEE"; 
 
?> 
 
<tr bgcolor="<?php echo $bgcolor ;?>">
 
    <td bgcolor="<?php echo $bgcolor ;?>"><center><?php echo $row_rs_report_order_detail['Emp_ID']; ?></center></td>
    <td bgcolor="<?php echo $bgcolor ;?>"><?php echo $row_rs_report_order_detail['Emp_Name']; ?></td> 
    <td><?php echo $row_rs_report_order_detail['Dep_Name']; ?></td>
    <td bgcolor="<?php echo $bgcolor ;?>"><?php echo $row_rs_report_order_detail['Leave_Name']; ?></td> 
    <td bgcolor="<?php echo $bgcolor ;?>"><center><?php echo $row_rs_report_order_detail['SUM(Rec_Day)']; ?></center></td> 
    <td bgcolor="<?php echo $bgcolor ;?>"><center><?php echo $row_rs_report_order_detail['SUM(Rec_Hour)']; ?></center></td> 

</tr> 
 
<?php 
	$old_record = $row_rs_report_order_detail['Emp_Name'] ;
} while ($row_rs_report_order_detail = mysql_fetch_assoc($rs_report_order_detail)); 
?>
 
</table>