Online PHP editor | refs for f4kRM

<?php $array = [ [ "id" => '6230061c0e88d709ca0d7bbc', 'name' => 'Mobile SamSung', 'slug' => 'mobile-samsung', 'createdAt' => '1648006346' ], [ "id" => '5d1eff529a426778d4b92383', 'name' => 'Mobile Iphone', 'slug' => 'mobile-iphone', 'createdAt' => '1647314181' ], [ "id" => '5d1eff6b9a426778d4b92dc4', 'name' => 'Mobile SamSung', 'slug' => 'mobile-samsung', 'createdAt' => '1647314460' ], [ "id" => '5f894011266aea580b028cb0', 'name' => 'Mobile LG', 'slug' => 'mobile-lg', 'createdAt' => '1647314456' ] ]; $newArray = []; foreach ($array as $key => $value) { $findIndex = array_search($value['slug'], array_column($newArray, 'slug')); if ($findIndex === false) { $newArray[] = $value; } elseif ($findIndex !== false && $newArray[$findIndex]['createdAt'] <= $value['createdAt']) { $newArray[$findIndex] = $value; } } print_r($newArray);