How can I create an array without duplicates with this structure - php

Question

I have this array structure:
array (
0 =>
array (
'id' => '17',
'name' => 'aba aba',
'english_name' => 'ABA ABA',
'group_id' => '1',
),
1 =>
array (
'id' => '23',
'name' => 'bcb bcb',
'english_name' => 'BCB BCB',
'group_id' => '2',
),
2 =>
array (
'id' => '17',
'name' => 'aba aba',
'english_name' => 'ABA ABA',
'group_id' => '4',
),
);
I want to create another array with no duplicates but having in mind in which group_id are the duplicate ones. I'm looking for this structure:
array (
17 =>
array (
'name' => 'ABA ABA',
'groups' =>
array (
0 => '1',
1 => '4',
),
),
23 =>
array (
'name' => 'BCB BCB',
'groups' =>
array (
0 => '2',
),
),
);
I tried with this code but it doesn't give me what I'm looking for, I don't know what I'm doing wrong.
Code:
foreach ($array as $value) {
if (!in_array($value['id'], $array[$value['id']] )) {
$interested [$value['id']]['name'] = $value['english_name'];
$interested [$value['id']]['groups'][]= $value['group_id'];
} else if (in_array($value['id'], $array[$value['id']] )){
$interested [$value['id']]['groups'][] = $value['group_id'];
}
}

Answer 1

Simple loop and assign using the id as your pivot:
<?php
$data =
array (
0 =>
array (
'id' => '17',
'name' => 'aba aba',
'english_name' => 'ABA ABA',
'group_id' => '1',
),
1 =>
array (
'id' => '23',
'name' => 'bcb bcb',
'english_name' => 'BCB BCB',
'group_id' => '2',
),
2 =>
array (
'id' => '17',
'name' => 'aba aba',
'english_name' => 'ABA ABA',
'group_id' => '4',
),
);
foreach($data as $item) {
$result[$item['id']]['name'] = $item['english_name'];
$result[$item['id']]['groups'][] = $item['group_id'];
}
var_export($result);
Output:
array (
17 =>
array (
'name' => 'ABA ABA',
'groups' =>
array (
0 => '1',
1 => '4',
),
),
23 =>
array (
'name' => 'BCB BCB',
'groups' =>
array (
0 => '2',
),
),
)

Answer 2

$data = array (
0 =>
array (
'id' => '17',
'name' => 'aba aba',
'english_name' => 'ABA ABA',
'group_id' => '1',
),
1 =>
array (
'id' => '23',
'name' => 'bcb bcb',
'english_name' => 'BCB BCB',
'group_id' => '2',
),
2 =>
array (
'id' => '17',
'name' => 'aba aba',
'english_name' => 'ABA ABA',
'group_id' => '4',
),
);
function unique_multidim_array($array, $key) {
$temp_array = array();
$i = 0;
$key_array = array();
foreach($array as $val) {
if (!in_array($val[$key], $key_array)) {
$key_array[$i] = $val[$key];
$temp_array[$i] = $val;
}
$i++;
}
return $temp_array;
}
$newdata = unique_multidim_array($data,'id');
The function taken from here. Details on : https://www.php.net/manual/tr/function.array-unique.php

Answer 3

It isn't very clear from your code what you are trying to do, but below is one way.
Loop over your subarrays one by one.
have a new array, say $set which will be an associative array of keys and values where keys are the IDs and values are the name and groups attributes.
If $set has the ID isset already, add to groups, else, create a new one and then add groups.
Snippet:
<?php
$set = [];
foreach($array as $val){
$group_id = $val['group_id'];
if(!isset($set[$val['id']])){
$set[$val['id']] = [
'name' => $val['english_name'],
'groups' => []
];
}
$set[$val['id']]['groups'][] = $group_id;
}
print_r($set);
Demo: http://sandbox.onlinephpfunctions.com/code/af65effc35a0275bdf6908c77dc0cb701d36010e

Answer 4

Functional way)
function group( $groups, $item ) {
$id = $item['id'];
if ( !isset($groups[$id]) ) {
$groups[$id] = array (
'name' => $item['name'],
'groups' => array(),
);
}
array_push($groups[$id]['groups'], $item['group_id']);
return $groups;
}
array_reduce($data, 'group', array());
Please take a look at playground
Also to make groups array unique PHP Collections could be used. For example, Set data structure.