php导出csv文件,可导出前导0实例代码

//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();}