原理主要是php代碼生成excel文件，被輸出內容以‘,’隔開，自動識別逗號符隔開的內容放入excel內不同的表格內，需要換行處加上轉義符\n，輸出內容涉及中文的需轉化編碼utf-8爲gbk。
方式一：
header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:attachment;filename=pay-".time().".xls");
header('Pragma: no-cache');
header('Expires: 0');
foreach ($datas as $val) {
echo iconv('UTF-8','GBK//IGNORE',implode("\t",$val))."\n";
}方式二：
$str_list = '';
foreach($result as $k=>$v){
$str_list .= $arr[$k]['createtime'].",".$arr[$k]['sid'].",".iconv('utf-8','GBK',$arr[$k]['accountingtype']).",".iconv('utf-8','GBK', $arr[$k]['accountingitem']).",".iconv('utf-8','GBK',$arr[$k]['moneytype'])."," . iconv('utf-8','GBK',$arr[$k]['remark']) . "," . iconv('utf-8','GBK',$arr[$k]['accountingtype1']). "," .iconv('utf-8','GBK',$arr[$k]['balance']). ""."\n";
}
$bankcard = iconv('utf-8','GBK','時間'); //中文轉碼
$accountname = iconv('utf-8','GBK','商家id');
$money = iconv('utf-8','GBK','收/支');
$moenytype = iconv('utf-8','GBK','記賬項目');
$bankname = iconv('utf-8','GBK','賬戶類型');
$bankbranch = iconv('utf-8','GBK','內容');
$provice = iconv('utf-8','GBK','發生金額');
$diqu = iconv('utf-8','GBK','賬戶餘額');
$str = $bankcard.",".$accountname.",".$money.",".$moenytype.",".$bankname.",".$bankbranch.",".$provice.",".$diqu."\n";
$filename = date('YmdHis').'.csv';
$this->export_csv($filename,$str.$str_list);