在php中，我很难用多while循环插入数据
所以我有5张table
so表

soNo    Customer    Date_masuk    Date_keluar    note    status

所以请详细说明

id    soNo    kode_servis    name_servis    qty

所以请详细说明

id    kode_servis    nama_servis    qty

发件箱

id    number    date    kode_brg    nama_brg    harga    jumlah

服务详情

id    code_servis    name_servis    code_brg    name_brg    qty

这是我的问题

<?php
$con = mysqli_connect('localhost', 'root', '', 'a.karat');
header("Location: soAdd.php");

if(isset($_POST['save'])){

$soNo           = $_POST['soNo'];   
$customer       = $_POST['customer'];   
$date_masuk = $_POST['date_masuk'];
$date_keluar    = $_POST['date_keluar'];    
$note           = $_POST['note'];
$status         = $_POST['status'];

$input = mysqli_query($con, "INSERT INTO so VALUES('$soNo', '$customer', '$date_masuk', '$date_keluar','$note', '$status')") or die(mysqli_error());

if($input){
    $query=mysqli_query($con,"SELECT * from so_detail_sementara ");
    while($r=mysqli_fetch_row($query)){    <=== 1st While loop

        $mahdi=mysqli_query($con,"SELECT * from servis_detil where kd_servis = '$r[1]' ");
    while($alra=mysqli_fetch_row($mahdi)){ <=== 2nd while loop

    mysqli_query($con, "insert into so_detail(soNo, kode_servis, nama_servis, qty)
                    values('$soNo','$r[1]','$r[2]','$r[3]')")or die(mysqli_error());

    mysqli_query($con,"insert into outbox (number, date, kode_brg, nama_brg, harga, jumlah)
                    values('$soNo','$date_masuk','$alra[3]','$alra[4]','0','$alra[5]')")or die(mysqli_error());

如果只使用1个while循环，查询就可以工作，但是如果使用2个while循环并且没有出现错误，查询就不工作了，页面只是继续加载。
需要你帮忙解决我的问题吗
谢谢，