$field = "pay_order_number,FROM_UNIXTIME(pay_time) as pay_time,user_account,game_name,promote_account,spend_ip,server_name,game_player_name,pay_amount,cost,pay_way";
$field = "pay_order_number,FROM_UNIXTIME(pay_time) as pay_time,user_account,game_name,promote_account,spend_ip,server_name,game_player_name,pay_amount,cost,pay_way,extend";