我希望我的用户下载一个PHPExcel文件，我希望我的按钮禁用并说明加载...而文件没有开始下载。问题是下载按钮是从我的数据库MySql获取数据，以放入生成此文件所需的Excel格式的每个单元格。我找不到这种类型的问题的答案。提前谢谢。
这是我生成Excel文件的PHP代码。
if(isset($_POST['dl_xls'])){
include_once('php/connection.php');
include('Classes/PHPExcel.php');
require_once "Classes/PHPExcel/IOFactory.php";
//auto generate PR number >>>
$sql_check_exist = "SELECT pr_digits_ID FROM pr_digits WHERE PR_ID ='".$pr_id."' LIMIT 1";
$query_check_exist = mysqli_query($db,$sql_check_exist);
$sql_max_digits = "SELECT MAX(pr_digit) AS max_digit FROM pr_digits WHERE year ='".$year."' AND month = '".$month."' ORDER BY pr_digits_ID DESC LIMIT 20";
$query_max_digits = mysqli_query($db,$sql_max_digits);
if(mysqli_num_rows($query_check_exist) == 0){
if(mysqli_num_rows($query_max_digits)>0){
$r_d = mysqli_fetch_array($query_max_digits);
$max_digit = $r_d['max_digit'];
$max_digit += 1;
$sql_add_digit= "INSERT INTO pr_digits (PR_ID, year, month, pr_digit) VALUES ('".$pr_id."','".$year."', '".$month."', '".$max_digit."')";
mysqli_query($db,$sql_add_digit);
$dig = sprintf('%03d',$max_digit);
$c = $year.'-'.$month.'-'.$dig;
}else{
$r_d = mysqli_fetch_array($query_max_digits);
$max_digit = 1;
$sql_add_digit = "INSERT INTO pr_digits (PR_ID, year, month, pr_digit) VALUES ('".$pr_id."','".$year."', '".$month."', '".$max_digit."')";
mysqli_query($db,$sql_add_digit);
$dig = sprintf('%03d',$max_digit);
$c = $year.'-'.$month.'-'.$dig;
}
}else{
}
//<<<<<
$col_no = 17;
//load template
$obj_tmp = PHPExcel_IOFactory::load("src/dole_template.xls");
$obj_tmp ->setActiveSheetIndex(0);
while($data_row=mysqli_fetch_array($rsitems)){
$obj_tmp -> getActiveSheet() -> SetCellValue('A'.$col_no, $data_row['quantity']);
$obj_tmp -> getActiveSheet() -> SetCellValue('B'.$col_no, $data_row['unit_issue']);
$obj_tmp -> getActiveSheet() -> SetCellValue('C'.$col_no, $data_row['item_des']);
$obj_tmp -> getActiveSheet() -> SetCellValue('G'.$col_no, $data_row['unit_cost']);
$obj_tmp -> getActiveSheet() -> SetCellValue('H'.$col_no, $data_row['total_cost']);
$col_no = $col_no + 2;
}
$obj_tmp -> getActiveSheet() -> SetCellValue('B7', $for_use);
$obj_tmp -> getActiveSheet() -> SetCellValue('A12', $f_office);
$obj_tmp -> getActiveSheet() -> SetCellValue('D12', $c);
$obj_tmp -> getActiveSheet() -> SetCellValue('G12', $pr_date);
$obj_tmp -> getActiveSheet() -> SetCellValue('B41', $pr_purpose);
$obj_tmp -> getActiveSheet() -> SetCellValue('G41', $pr_brand);
$obj_tmp -> getActiveSheet() -> SetCellValue('E43', $pr_reason);
$obj_tmp -> getActiveSheet() -> SetCellValue('B47', $pr_year);
### Recommending Approval
if($f_office === 'IMSD/PROPERTY' || $f_office === 'IMSD/PERSONNEL' || $f_office === 'IMSD/CASHIER' || $f_office === 'IMSD/DOCKET' || $f_office === 'OD' || $f_office === 'ARD/ADMIN'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'JULIE F. RODRIGUEZ');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'OIC-Chief, IMSD');
}else if($f_office === 'EPWW' || $f_office === 'EPWW/LIVELIHOOD'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'AURORA E. HALCON');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'OIC, TSSD-EPWW');
}else if($f_office === 'LRLS' || $f_office === 'LRLS/PLANNING'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'NELIA MUNGCAL');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'OIC, TSSD-LRLS');
}else if($f_office === 'MALSU'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'ATTY. MARION SEVILLA');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'Head, MALSU');
}else if($f_office === 'COA'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'MILAGROS PILAR');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'Audit Team Leader');
}else if($f_office === 'ARD/LABOR'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'ATTY. MARIA CONSUELO S. BACAY');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'Asst. Regional Director');
}else if($f_office === 'MPFO'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'ROWELLA G. GRANDE');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'Director II, MPFO');
}else if($f_office === 'CFO'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'ANDREA P. CABANSAG');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'Director II, CFO');
}else if($f_office === 'MFO'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'LEONIDES CASTILLON JR.');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'Director II, MFO');
}else if($f_office === 'PFO'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'MA. CORAZON PEPITO');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'Director II, PFO');
}else if($f_office === 'MTPLFO'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'BENVENUTO C. ALEGRE');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'Director II, MTPLFO');
}else if($f_office === 'QCFO'){
$obj_tmp -> getActiveSheet() -> SetCellValue('E49', 'LILIBETH CAGARA');
$obj_tmp -> getActiveSheet() -> SetCellValue('E50', 'Director II, QCFO');
}
### Approved
if($total_s > 50000){
$obj_tmp -> getActiveSheet() -> SetCellValue('E54', 'NELSON C. HORNILLA');
$obj_tmp -> getActiveSheet() -> SetCellValue('E55', 'OIC, Regional Director');
}else{
$obj_tmp -> getActiveSheet() -> SetCellValue('E54', 'IRMA S. VALIENTE');
$obj_tmp -> getActiveSheet() -> SetCellValue('E55', 'Assistant Regional Director');
}
$obj_tmp -> getActiveSheet() -> SetCellValue('H39', $total_s);
$filename= $c.'.xls';
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="'.$filename.'"');
header('Cache-Control: max-age=0');
$obj_writer = PHPExcel_IOFactory::createWriter($obj_tmp, 'Excel5');
$obj_writer ->save('php://output');
$update_pr_no = "UPDATE pr_table SET save = 1, pr_no='".$c."' WHERE PR_ID = '".$pr_id."'";
mysqli_query($db,$update_pr_no);
mysqli_close($db);
我知道我需要在这里使用一些jquery来获得逻辑，但我不知道XD是如何得到一些简单的jquery来改变按钮内的文本。
function button_ds() {
_('add_btn').disabled = true;
_('dl_xls').innerHTML = 'Click to go Back';
}
发布dl_xls的HTML表单
<form method="POST" role="form" id="dl_xls_frm">
<button type="submit" name="dl_xls" id="dl_xls" class="btn btn-success" onclick="button_ds()">Download Excel <span class="glyphicon glyphicon-download-alt" aria-hidden="true"></span></button>
</form>
再次感谢。