ThinkPHP导出CSV、Excel

<?php
namespace Think;
class Csv
{
   //导出csv文件
   public function put_csv($list,$title){
   $file_name="CSV".date("mdHis",time()).".csv";
   header ( 'Content-Type: application/vnd.ms-excel' );
   header ( 'Content-Disposition: attachment;filename='.$file_name );
   header ( 'Cache-Control: max-age=0' );
   $file = fopen('php://output',"a");
   $limit=1000;
   $calc=0;
   foreach ($title as $v){
   $tit[]=iconv('UTF-8', 'GB2312//IGNORE',$v);
   }
   fputcsv($file,$tit);
   foreach ($list as $v){
   $calc++;
   if($limit==$calc){
   ob_flush();
   flush();
   $calc=0;
   }
   foreach ($v as $t){
   $tarr[]=iconv('UTF-8', 'GB2312//IGNORE',$t);
   }
   fputcsv($file,$tarr);
   unset($tarr);
   }
   unset($list);
   fclose($file);
   exit();
   }
}
?>

$csv=new Csv();
$list=M("members")->field($field)->limit(10000)->select();//查询数据，可以进行处理
$csv_title=array('用户ID','用户名','绑定邮箱','绑定手机','注册时间','注册IP');
$csv->put_csv($list,$csv_title);