- array_unique: documentation ( source)
- json_encode: documentation ( source)
<?php
$cars = [
[
'id' => 1,
'icon' => 'sim',
],
[
'id' => 2,
'icon' => 'airtime',
],
[
'id' => 3,
'icon' => 'sim',
],
# This is the same as the first
[
'id' => 1,
'icon' => 'sim',
],
];
echo json_encode(array_unique($cars, SORT_REGULAR));