list <ul> and <li> php mysql with id - php

Question

here I want to create a list of <ul> and <li> which is not limited when input in the database, here I do not find any problem in creating <li> and <ul> in one or two lists and three lists using <ul> and < li>, but here I want to create an infinite list of <li> and <ul>, can someone help me?
my database :
my code :
<?php
$get_main = $db->query("SELECT * FROM tb_akun WHERE parent_akun = '0'");
foreach($get_main AS $main){
$main_kode = preg_replace('/0+/','',$main['kode_akun']);
?>
<div class="ulli-none">
<ul>
<li><?= $main_kode ?> - <?= $main['nama_akun'] ?>
<ul>
<?php
$get_parent = $db->query("SELECT * FROM tb_akun WHERE parent_akun = {$main['kode_akun']}");
foreach($get_parent AS $parent){
?>
<li><?= $main_kode ?>-<?= $parent['kode_akun'] ?> <?= $parent['nama_akun'] ?>
<ul>
<?php
$get_subs = $db->query("SELECT * FROM tb_akun WHERE parent_akun = {$parent['kode_akun']}");
foreach($get_subs AS $subs){
?>
<li><?= $main_kode ?>-<?= $subs['kode_akun'] ?> <?= $subs['nama_akun'] ?></li>
<?php } ?>
</ul>
</li>
<?php } ?>
</ul>
</li>
</ul>
</div>
<?php } ?>
the final result :

Answer 1

You'll need a recursive function for this.
<?php
$get_main = $db->query("SELECT * FROM tb_akun WHERE parent_akun = '0'");
?>
<div class="ulli-none">
<?php
recursiveList($get_main, $db);
?>
</div>
<?php
function recursiveList($items, $db, $mainPrefix = ''){
if (empty($items)){
return;
}
?>
<ul>
<?php
foreach($items AS $item){
if (!$mainPrefix) {
$prefix = $mainPrefix = preg_replace('/0+/','', $item['kode_akun']);
} else {
$prefix = $mainPrefix . ' - ' . $item['kode_akun'];
}
?>
<li>
<span><?= $prefix ?> - <?= $item['nama_akun'] ?></span>
<?php
$subs = $db->query("SELECT * FROM tb_akun WHERE parent_akun = {$item['kode_akun']}");
recursiveList($subs, $db, $mainPrefix);
?>
</li>
<?php
}
?>
</ul>
<?php
}
?>
Keep in mind that you're querying the subs for every record. This will become time consuming when there're a lot of records. To further optimize this you might want to fetch all records and collect them within an array; E.g.
$get_main = $db->query("SELECT * FROM tb_akun");
$all = [];
foreach ($get_main as $item) {
if (empty($all[$item['parent_akun']])) {
$all[$item['parent_akun']] = [];
}
$all[$item['parent_akun']][$item['kode_akun']] = $item;
}
?>
<div class="ulli-none">
<?php
recursiveList($all);
?>
</div>
<?php
function recursiveList($all, $parentId = 0, $mainPrefix = ''){
if (empty($all[$parentId])){
return;
}
$items = $all[$parentId];
?>
<ul>
<?php
foreach($items AS $item){
if (!$mainPrefix) {
$prefix = $mainPrefix = preg_replace('/0+/','', $item['kode_akun']);
} else {
$prefix = $mainPrefix . ' - ' . $item['kode_akun'];
}
?>
<li>
<span><?= $prefix ?> - <?= $item['nama_akun'] ?></span>
<?php
recursiveList($all, $item['kode_anun'], $mainPrefix );
?>
</li>
<?php
}
?>
</ul>
<?php
}
?>