How does Thinkphp5 store the exported excel table in the specified directory of the project directory on the server?

/ *

excel table export
@ param string $fileName file name
@ param array $headArr header name
@ param array $data data to be exported
@ author static7 * /

function excelExport ($fileName ="", $headArr = [], $data = []) {

$fileName .= "_" . date("Y_m_d", Request::instance()->time()) . ".xls";

$objPHPExcel = new \PHPExcel();

$objPHPExcel->getProperties();

$key = ord("A"); // 

foreach ($headArr as $v) {

    $colum = chr($key);

    $objPHPExcel->setActiveSheetIndex(0)->setCellValue($colum . "1", $v);

    $objPHPExcel->setActiveSheetIndex(0)->setCellValue($colum . "1", $v);

    $key += 1;

}

$column = 2;

$objActSheet = $objPHPExcel->getActiveSheet();

foreach ($data as $key => $rows) { // 

    $span = ord("A");

    foreach ($rows as $keyName => $value) { // 

        $objActSheet->setCellValue(chr($span) . $column, $value);

        $spanPP;

    }

    $columnPP;

}

$fileName = iconv("utf-8", "gb2312", $fileName); // 

$objPHPExcel->setActiveSheetIndex(0); // ,Excel

header("Content-Type: application/vnd.ms-excel");

header("Content-Disposition: attachment;filename="$fileName"");

header("Cache-Control: max-age=0");

$objWriter = \PHPExcel_IOFactory::createWriter($objPHPExcel, "Excel5");

$objWriter->save("php://output"); // 

exit();

}
/ / this is to tell the browser to download the excel file, so how to generate the excel file to the specified directory without telling the browser to download it locally?

{ $file = '456.xls'; $file_path = ROOT_PATH.'uploads/Tmp/'.$file; $PHPExcel = new \PHPExcel(); $PHPSheet = $PHPExcel->getActiveSheet(); $PHPSheet->setTitle("demo"); //sheet $PHPSheet->setCellValue("A1","")->setCellValue("B1","");// $PHPSheet->setCellValue("A2","")->setCellValue("B2","2121");// $objWriter = \PHPExcel_IOFactory::createWriter($PHPExcel, 'Excel2007'); $objWriter->save($file_path); // }