php数据几行代码导出到excel（非插件）

<?php

header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:attachment;filename=打钱记录.xls");   
header("Content-Transfer-Encoding:binary"); 
echo iconv("UTF-8", "GBK", "申请时间"); echo "\t";
echo iconv("UTF-8", "GBK", "支付时间") ;echo "\t";  

foreach($list as $key => $val) { 
    echo "\r\n";
    echo iconv("UTF-8", "GBK", "".date("Y-m-d H:i:s", $val[‘add_time‘])); echo "\t";
    echo iconv("UTF-8", "GBK", "".date("Y-m-d H:i:s", $val[‘pay_time‘])); echo "\t";
}