how to array push with multidimension in php - php

Question

I have an array in PHP loop output like this
this is my php code :
$sql = "SELECT * FROM `acc` ";
$stm = $conn->prepare($sql);
$stm->execute();
$array= [];
while ($row = $stm->fetch(PDO::FETCH_ASSOC)) {
$array[]=$row['h_id'];
}
print_r($array);
and output is :
Array
( [0] => 11
[1] => 12
[2] => 13
[3] => 1101
[4] => 1102
[5] => 110101
[6] => 110102
[7] => 1201
[8] => 1202
[9] => 1301
[10] => 1302
[11] => 1303
[12] => 130201
[13] => 130202
[14] => 130301
[15] => 130302
)
and I want to sort and rearrange array to multi-dimension for parent and child with php Loop Like this :
Array
(
[11] => Array
(
[1101] => Array
(
[0] => 110101
[1] => 110102
)
)
[12] => Array
(
[0] => 1201
[1] => 1202
)
[13] => Array
(
[0] => 1301
[1302] => Array
(
[0] => 130201
[1] => 130202
)
[1303] => Array
(
[0] => 130301
[1] => 130302
)
)
how to implemention and push array to another with php.
thanks!

Answer 1

I absolutely don't understand what you're doing, but I think I've grasped how your input may be mapped to desired output. Here is the code:
<?php
$flat = [
11,
12,
13,
1101,
1102,
110101,
110102,
1201,
1202,
1301,
1302,
1303,
130201,
130202,
130301,
130302,
];
function expand($flat)
{
$expanded = [];
foreach ($flat as $element) {
$sections = str_split((string)$element, 2);
$tmp = &$expanded;
$path = '';
foreach ($sections as $section) {
$path .= $section;
if (!isset($tmp[$path])) {
$tmp[$path] = [];
}
$tmp =& $tmp[$path];
}
unset($tmp);
}
return $expanded;
}
function fold($expanded) {
$folded = [];
foreach ($expanded as $key => $value) {
if ($value === []) {
$folded[] = $key;
} else {
$folded[$key] = fold($value);
}
}
return $folded;
};
print_r(fold(expand($flat)));
And here is its output (which is suspiciously close to yours):
Array
(
[11] => Array
(
[1101] => Array
(
[0] => 110101
[1] => 110102
)
[1102] => 1102
)
[12] => Array
(
[0] => 1201
[1] => 1202
)
[13] => Array
(
[0] => 1301
[1302] => Array
(
[0] => 130201
[1] => 130202
)
[1303] => Array
(
[0] => 130301
[1] => 130302
)
)
)
There are some differences, though, e.g. there is element 1102 in your input, but in your sample output it is absent, and I'm not sure if you forgot it or if you have filtered it out for some reason.