php how to grouping by id - php

Question

I'm very new in PHP. I'm doing with the array data structure. Currently, I got two result which is the same ID but different details. I need to combine the details based on the ID.
This is my array result
array:2 [
0 => array:13 [
"id" => "1"
"date" => "01-02-2019"
"order" => array:1 [
0 => array:2 [
"code" => "F001"
"name" => "fish"
]
]
]
1 => array:13 [
"id" => "1"
"date" => "01-02-2019"
"order" => array:1 [
0 => array:2 [
"code" => "F002"
"name" => "chicken"
]
]
]
]
This is my expected result
array:1 [
0 => array:13 [
"id" => "1"
"date" => "01-02-2019"
"order" => array:2 [
0 => array:2 [
"code" => "F001"
"name" => "fish"
]
1 => array:2 [
"code" => "F002"
"name" => "chicken"
]
]
]
]
I'm trying to insert the order array if there have the same id
This is my code
public function order($value)
{
$group_id = [];
$groupItem = [];
foreach ($value as $item) {
$item['date'] = date('Y-m-d',strtotime($item['date']));
$groupItem = $item['order'][] = [
'id' => $item['id'],
'name' => $item['name'],
];
$group_id[$item['id']][]= $groupItem;
}
}
Result
array:1 [
"1" => array:1 [
0 => array:2 [
"code" => "F001"
"name" => "fish"
]
1 => array:2 [
"code" => "F002"
"name" => "chicken"
]
]
]
As you can see, I grouped the order but the date and id were missing.

Answer 1

Here is a working order function:
function order($input) {
$output = array();
foreach($input as $item) {
if (!isset($output[$item['id']])) {
$output[$item['id']] = array(
"id" => $item["id"],
"date" => $item["date"],
"order" => array()
);
}
$output[$item['id']]['order'][] = $item['order'];
}
return array_values($output);
}
INPUT:
array(
array(
"id" => "1",
"date" => "01-02-2019",
"order" => array(
array(
"code" => "F001",
"name" => "fish"
)
)
),
array(
"id" => "1",
"date" => "01-02-2019",
"order" => array(
array(
"code" => "F002",
"name" => "chicken"
)
)
)
);
OUTPUT:
array(
array(
"id"=> "1",
"date"=> "01-02-2019",
"order"=> array(
array(
array(
"code"=> "F001",
"name"=> "fish"
)
),
array(
array(
"code"=> "F002",
"name"=> "chicken"
)
)
)
)
)

Answer 2

Assign the proper data. Try -
foreach ($value as $item) {
$date = date('Y-m-d',strtotime($item['date']));
$id = $item['id'];
$group_id[$id]['id'] = $id;
$group_id[$id]['date'] = $date;
$group_id[$id]['order'][] = [
'id' => $item['id'],
'name' => $item['name'],
];
}

Answer 3

I would write something like this, if you need to account for multiple IDs:
$result = array_reduce( $input, function ( $result, $item ) {
$id = $item['id'];
if ( ! isset( $result[ $id ] ) ) { // We don't have an item yet.
$result[ $id ] = $item;
} else { // We have an item and need to add orders to it.
$result[ $id ]['order'] = array_merge( $result[ $id ]['order'], $item['order'] );
}
return $result;
}, [] );