Please tell me, teacher, why is there no error message and no download response?-PHP Chinese Network Q&A

<body>

<? php

$r1r = implode(",",$_POST['ypname']);

$r2r = implode(",",$_POST['guige'] );

$r3r = implode(",",$_POST['shengcan']);

$r4r = implode(",",$_POST['danwei']);

$r5r = implode(",",$_POST['pihao']);

$r6r = implode(",",$_POST['bz']);

$r7r = implode(",",$_POST['rq']);

$r8r = implode(",",$_POST['djlx']);

$r9r = implode(",",$_POST['rk']);

$rwr = implode(",",$_POST['ch']);

$data2 = array_merge($r1r,$r2r);

var_dump ($data2);

/**

* Data export

* @param array $title Title row name

* @param array $data Export data

* @param string $fileName File name

* @param string $savePath Save path

* @param $type Whether to download false--save true--download

* @return string Return the full file Path

* @throws PHPExcel_Exception

* @throws PHPExcel_Reader_Exception

$title = array("Product name", "Specification", "Manufacturer", "Unit", "Batch number", "Remarks", "Date", "Document type", "Inbound quantity", "Export quantity" Quantity");

$type = true;

$data = r1r;

$fileName = 'bflxexc';

function exportExcel($title=array(), $data=array(), $fileName='', $savePath='./', $isDown=false){

include('PHPExcel. php');

$obj = new PHPExcel();

//Horizontal cell identification

$cellName = array('A' , 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', ' N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' , 'AA', 'AB', 'AC', 'AD', 'AE', 'AF', 'AG', 'AH', 'AI', 'AJ', 'AK', 'AL', ' AM', 'AN', 'AO', 'AP', 'AQ', 'AR', 'AS', 'AT', 'AU', 'AV', 'AW', 'AX', 'AY' , 'AZ');

$obj->getActiveSheet(0)->setTitle('bflx'); //Set sheet name

$_row = 1; //Set vertical cell identifier

if($title){

$_cnt = count($title);

$obj->getActiveSheet(0)->mergeCells('A'.$_row.':'.$cellName[$_cnt-1].$_row); //Merge cells

$obj->setActiveSheetIndex(0)->setCellValue('A'.$_row, '$r1r'.date('Y-m-d H:i:s')); //Set the merged cell content

$_row ;

$i = 0;

foreach($title AS $v){ //Set column title

$obj-> ;setActiveSheetIndex(0)->setCellValue($cellName[$i].$_row, $v);

$i ;

}