Online PHP editor | refs for TeTpK

<?php $arr1 = [ ['customer_id' => 1, 'Expire' => '2019-05-14', 'paid' => 1], ['customer_id' => 2, 'Expire' => '2019-06-20', 'paid' => 0], ['customer_id' => 2, 'Expire' => '2019-06-21', 'paid' => 1], ]; $arr2 = [ ['id' => 3943, 'customer_id' => 1, 'Expire' => '2019-05-14'], ['id' => 3944, 'customer_id' => 1, 'Expire' => '2019-05-14'], ['id' => 4713, 'customer_id' => 2, 'Expire' => '2019-06-20'], ['id' => 4714, 'customer_id' => 2, 'Expire' => '2019-06-21'] ]; foreach ($arr2 as &$a) { $customerID = $a['customer_id']; $arr1_key = array_search($customerID, array_column($arr1, 'customer_id')); $paid = $arr1[$arr1_key]['paid']; $a['paid'] = $paid; } print_r($arr2);