Arrange items based on product id - php

Question

In the JSON file, there are multiple item based on the same product_id. I have to create multidimensional array based on product_id and items.
As per my sample php code, product_id is repeatedly listing. Results are printed in php code.
Expecting results are given below.
testData.json
"data": [
{
"product_id": "123456",
"item": "ZAD",
"time": "15:30",
"quantity": 1
},
{
"product_id": "24534"
"item": "REST"
"time": "5:30"
"quantity": 1
},
{
"product_id": "123456"
"item": "RAD"
"time": "10:30"
"quantity": 2
}
]
test.php
$json = file_get_contents('testData.json');
$d_data = json_decode($json, true);
$f_data = $d_data['data'];
foreach($f_data as $data) {
$result = [
$data['product_id'],
$data['item']
]
print_r($result);
/* Array(
[0] => 123456
[1] => ZAD
)
Array(
[0] => 123456
[1] => RAD
)
Array(
[0] => 24534
[1] => REST
)
*/
}
Expecting Result
123456
[
ZAD
[
"time" => "15:30",
"quantity" => 1
],
RAD
[
"time" => "10:30"
"quantity" => 2
],
],
24534
[
REST
[
"time" => "5:30"
"quantity" => 1
]
]

Answer 1

You just need to account for both product_id and item as sub-keys in the final array:
$result = [];
foreach($f_data as $data) {
$result[$data['product_id']][$data['item']] = [
$data['time'],
$data['quantity']
];
}
print_r($result);
Demo: https://3v4l.org/sf7om
I should note, if two items have the same product_id and same item, this code will only keep the last one. If that scenario applies to you, you just need to use the append mode ([]) of the array:
$result[$data['product_id']][$data['item']][] = [
$data['time'],
$data['quantity']
];