how to assemble data in an array by a value in php - php

Question

i have an array like this :
[
['external_account' => 'AAA', 'label' => 'Nbr de client', 'value' => 1],
['external_account' => 'AAA', 'label' => 'TTC', 'value' => 1],
['external_account' => 'BBB', 'label' => 'HT', 'value' => 0],
]
and i want to assemble data by external_account value and have an outpout (array) like this one
[
[
'external_account' => 'AAA',
'data' => [
['label' => 'Nbr de client', 'value' => 1],
['label' => 'TTC', 'value' => 1]
]
],
[
'external_account' => 'BBB',
'data' => [
['label' => 'HT', 'value' => 0]
]
]
]
my code so far :
foreach ($result as $current_key => $current_array) {
$assemble = [];
foreach ($result as $search_key => $search_array) {
if (
$current_key != $search_key &&
$current_array["external_account"] ==
$search_array["external_account"]
) {
$valeur = $current_array["external_account"];
array_push(
$assemble,
$current_array["label"],
$current_array["value"]
);
unset($result[$current_key]);
}
$data[] = ["external_account" => $valeur, "data" => $assemble];
}
}
please tell me what am doing wrong, am stuck on it.
The output of my code : enter link description here

Answer 1

It looks more complicated than it needs to be. For grouping problems like this, it's just a matter of using the thing you want to group by as a key as you build your result.
$result = [];
foreach ($data as $item) {
// extract the first key (external_account)
$account = array_shift($item);
// then use it as the key to group your data
$result[$account]['external_account'] = $account;
$result[$account]['data'][] = $item;
}
If you don't want to keep that key in your result, you can remove it with
$result = array_values($result);