PHP - mensaje php a excel

if (isset($_GET["excel"]))

{

header("Pragma: public");

header("Expires: 0");

header("Cache-Control: must-revalidate, post-check=0, pre-check=0");

header("Content-Type: application/force-download");

header("Content-Type: application/octet-stream");

header("Content-Type: application/download");

header("Content-Disposition: attachment;filename=result.xls ");

header("Content-Transfer-Encoding: binary ");

/*

   header('Content-type: application/vnd.ms-excel; charset=UTF-8');

   header('Content-Disposition: attachment; filename=oficios.xls');

   header('Pragma: no-cache');

   header('Expires: 0');

*/

}

   $connect = pg_connect("host=localhost port=5432 dbname=administra user=postgres password=1234");

   $modcod = $_GET['cedula'];

   $consulta2 = "SELECT * FROM deuda WHERE deuda.cedula = '$modcod'  ORDER BY nroapto";

   $actualiza = @pg_query($connect,$consulta2);

//////////

echo"<table align='center' border='1' bordercolor='#00CC99' bgcolor='#99CC00'>

       <tr>

           <th width='100' align='center'>Apartamento

           <th width='100' align='center'>Fecha

           <th width='100' align='center'>Monto

	   </tr>

	 </table>

           <a href='consulta.php?excel'>Excel</a>";

$nombre = "SELECT apellidos,nombres FROM propietarios WHERE propietarios.cedula = '$modcod'";

$nombre1 = @pg_query($connect,$nombre);

//********************************

while ($nombre = @pg_fetch_array($nombre1)):

       $apellidos = $nombre['apellidos'];

	   $nombres   = $nombre['nombres'];

	   echo"<table border='1' bordercolor='#00CC99' bgcolor='#99CC00' align='center'>

	          <tr class='sr'>

	              <td width ='50' align='center'>Apellidos

	              <td width ='50' align='center'>Nombres

              </tr>";

           echo "  <tr>

				       <td width ='100'>$apellidos</td>

				       <td width ='100'>$nombres</td>

				   </tr>

    			</table><br>";

endwhile;

while($select2   = @pg_fetch_array($actualiza)):

	  $nroapto   = $select2['nroapto'];

      $nombres   = $select2['nombres'];

	  $fecha = $select2['fecha'];

      $anio  = substr($fecha,0,4);

      $mes   = substr($fecha,5,2);

	  $dia   = substr($fecha,8,2);

      $fecha2 = $anio."-".$mes."-".$dia;

	  $monto = $select2['monto'];

       echo"<table align='center' border='1' bordercolor='#FFCC99' bgcolor='#99CC00'>

	        <tr class='sr'>

              <td width='100' align='center'><input type='text' value='$nroapto' readonly='true' name='nroapto'>

	          <td width='100' align='center'><input type='text' value='$dia"."/"."$mes"."/"."$anio' readonly='true' name='fecha'>

			  <td width='100' align='right'>$monto

   	          </td>";

	     	  $total +=$monto;

endwhile;

		  if (isset($_POST['valor'])):

     		 	    echo $totalmes = $_POST['monto']-$_POST['valor'];

				 if (isset($totalmes)):

   				    $fecha2 = substr($_POST['fecha'],6,4).'-'.substr($_POST['fecha'],3,2).'-'.substr($_POST['fecha'],0,2);

                    $actualiza = "UPDATE deuda set monto=$totalmes WHERE deuda.cedula = '{$_POST['cedula']}' and deuda.fecha = '$fecha2'";

                    $connect2 = pg_connect("host=localhost port=5432 dbname=administra user=postgres password=1234");

		            $cambiar = @pg_query($connect2,$actualiza);

				 endif;

          endif;

echo"  		    </tr></table>";

echo "<br><table align='center' border='1' bordercolor='#FFCC99' bgcolor='#99CC00'>

	        <tr class='sr'>

	          <td width='100' style='color:#000000'>Total

			  <td width='100' align='right'>$total

  		    </tr>";

			?>