<?php
$originalArray = array(
array('id' => 1, 'sub-id' => 0),
array('id' => 2, 'sub-id' => 0),
array('id' => 3, 'sub-id' => 1),
array('id' => 4, 'sub-id' => 3),
array('id' => 5, 'sub-id' => 4),
array('id' => 6, 'sub-id' => 0),
array('id' => 7, 'sub-id' => 0),
array('id' => 8, 'sub-id' => 6),
array('id' => 9, 'sub-id' => 8),
array('id' => 10, 'sub-id' => 8)
);
foreach ($originalArray as $val) {
$array[$val["id"]] = $val;
}
// we first assign the arrays in a non-destructive way, so that we can easily find the
// appropriate key in the array
foreach ($array as $key => $val) {
if ($val["sub-id"] !== 0) {
$array[$val["sub-id"]]["sub"][] = & $array[$key];
}
}
// remove the ones from the first dimension which are somewhere deeper
foreach ($array as $key => $val) {
if ($val["sub-id"] !== 0) {
unset($array[$key]);
}
}
print_r($array);
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
- Array
(
[1] => Array
(
[id] => 1
[sub-id] => 0
[sub] => Array
(
[0] => Array
(
[id] => 3
[sub-id] => 1
[sub] => Array
(
[0] => Array
(
[id] => 4
[sub-id] => 3
[sub] => Array
(
[0] => Array
(
[id] => 5
[sub-id] => 4
)
)
)
)
)
)
)
[2] => Array
(
[id] => 2
[sub-id] => 0
)
[6] => Array
(
[id] => 6
[sub-id] => 0
[sub] => Array
(
[0] => Array
(
[id] => 8
[sub-id] => 6
[sub] => Array
(
[0] => Array
(
[id] => 9
[sub-id] => 8
)
[1] => Array
(
[id] => 10
[sub-id] => 8
)
)
)
)
)
[7] => Array
(
[id] => 7
[sub-id] => 0
)
)
preferences:
280.1 ms | 414 KiB | 426 Q