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){
       		$calc++;
       		//等于1000时刷新缓存
       		if($limit==$calc){
       		    ob_flush();
       			flush();
       			$calc=0;
       		}
       		//根据头部内容顺序插入
             foreach ($title as $key => $value) {
                $tarr[]=iconv('UTF-8', 'GB2312//IGNORE',$v[$key]);
             }
       		fputcsv($file,$tarr);
       		unset($tarr);
       	}
       	unset($list);
       	fclose($file);
       	exit();
   }