public function exportData($headRowArray, $dataArray, $exportFilename = '1111')
{
$header = array_values($headRowArray);
header("Content-type:text/csv;charset=utf-8");
header("Content-Disposition:attachment;filename={$exportFilename}.csv");
header('Cache-Control:must-revalidate,post-check=0,pre-check=0');
header('Expires:0');
header('Pragma:public');
$fp = fopen('php://output', 'w');
fwrite($fp, chr(0xEF).chr(0xBB).chr(0xBF));
fputcsv($fp, $header);
$total = count($dataArray);
$limit = 5000 ;
$page_num = ceil ( $total / $limit ) ;
for ( $i = 0 ; $i <= $page_num ; $i ++ ) {
$out_put_data = array_slice ( $dataArray , $limit * $i , $limit ) ;
foreach ( $out_put_data as $dataRowArray ) {
$data = array_map(function($item){return "\t".$item;},$data);
fputcsv($fp, $data);
}
ob_flush () ;
flush () ;
sleep(1);
}
fclose($fp);
exit;
}