1.变量：
$indexKey = array("序号","姓名","会员编号","手机号","余额","身份证号","创建时间","状态");
Array
(
[0] => Array
(
[id] => 1
[username] => 平台
[vip_no] => 880000000
[phone] => 17606543093
[balance] => 67065.47
[idnum] => 410381199012314567
[create_time] => 1498989892
[status] => 0
)
[1] => Array
(
[id] => 1
[username] => 平台
[vip_no] => 880000000
[phone] => 17606543093
[balance] => 67065.47
[idnum] => 410381199012314567
[create_time] => 1498989892
[status] => 0
)
)
$filename = 'testname';
