PHP exports csv files, leading 0 instances can be exported

//导出csv格式文件 $data数据 $title_arr标题 $file_name文件名 function exportCsv($data,$title_arr,$file_name=''){ ini_set("max_execution_time", "3600"); $csv_data = ''; /** 标题 */ $nums = count($title_arr); for ($i = 0; $i < $nums - 1; ++$i) { $csv_data .= '"' . $title_arr[$i] . '",'; } if ($nums > 0) { $csv_data .= '"' . $title_arr[$nums - 1] . "\"\r\n"; } foreach ($data as $k => $row) { foreach ($row as $key => $r){ $row[$key] = str_replace("\"", "\"\"", $r); $csv_data .= "\"\t" . $row[$key] . '",'; } $csv_data .= '"' . $row[$nums - 1] . "\"\r\n"; unset($data[$k]); } $csv_data = mb_convert_encoding($csv_data, "cp936", "UTF-8"); $file_name = empty($file_name) ? date('Y-m-d-H-i-s', time()) : $file_name; if (strpos($_SERVER['HTTP_USER_AGENT'], "MSIE")) { // 解决IE浏览器输出中文名乱码的bug $file_name = urlencode($file_name); $file_name = str_replace('+', '%20', $file_name); } $file_name = $file_name . '.csv'; header('Content-Type: application/download'); header("Content-type:text/csv;"); header("Content-Disposition:attachment;filename=" . $file_name); header('Cache-Control:must-revalidate,post-check=0,pre-check=0'); header('Expires:0'); header('Pragma:public'); echo $csv_data; exit(); }