php导出数据到excel文件 php导出excel乱码问题

/**
* 导出excel文件
* by bbs.it-home.org
*/
function xlsBOF() {
  echo pack("ssssss", 0x809, 0x8, 0x0, 0x10, 0x0, 0x0);
  return;
}
function xlsEOF() {
  echo pack("ss", 0x0A, 0x00);
  return;
}
function xlsWriteNumber($Row, $Col, $Value) {
  echo pack("sssss", 0x203, 14, $Row, $Col, 0x0);
  echo pack("d", $Value);
  return;
}
function xlsWriteLabel($Row, $Col, $Value ) {
$Value = iconv("UTF-8", "gb2312", $Value); //加上本语句，解决导出excel文件乱码问题20110629
  $L = strlen($Value);
  echo pack("ssssss", 0x204, 8 + $L, $Row, $Col, 0x0, $L);
  echo $Value;
return;
}
include "connection.php";
  $sql = "select ledger_name,ledger_sex ,ledger_age ,ledger_add  from ps_ledger_11";
  $query = mysql_query($sql);
  // 文件头
  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-Type: application/vnd.ms-excel; charset=UTF-8");
 header("Content-Disposition: attachment;filename=警务室辅助警力统计表.xls ");
//header("Content-Disposition: inline;  filename=\"" . $filename . ".xls\"");
//iconv("utf-8", "gb2312", $filename);//解决文件引起的乱码".xls\"");
  header("Content-Transfer-Encoding: binary ");
  // 向表中添加数据
  xlsBOF();
  xlsWriteLabel(1,0,"列名");
  xlsWriteLabel(1,1,"列名");
  xlsWriteLabel(1,2,"列名");
  xlsWriteLabel(1,3,"列名");
  xlsWriteLabel(1,4,"列名");
  $xlsRow = 1;
  while($array = mysql_fetch_array($query)) {
  ++$i;
  xlsWriteNumber($xlsRow,0,"$i");
  xlsWriteNumber($xlsRow,0,"$array[0]");
  xlsWriteLabel($xlsRow,1,"$array[1]");
  xlsWriteLabel($xlsRow,2,"$array[2]");
  xlsWriteLabel($xlsRow,3,"$array[3]");
xlsWriteLabel($xlsRow,4,"$array[4]");
  $xlsRow++;
  }
  xlsEOF();
  exit();
//20110629晚上测试通过。列名显示不出来？其它可以。
?>