Online PHP editor | output for IiJDY

<?php $json_string = '{"error_code":0,"error_message":"","return_data":{"items":[{"id":462,"users":"1,36,38"},{"id":462,"users":"1,4"}]}}'; $res = json_decode($json_string, 1); $items = $res['return_data']['items']; unset($res['return_data']['items']); // unset it first, to replace a new one $new_items = array(); foreach ($items as $key => $item) { $usersArray['id'] = $item['id']; $usersArray['users'] = array(); //create a new Array $usersIdArray = explode(',', $item['users']); foreach ($usersIdArray as $key => $user) { $usersArray['users'][] = array('user_id' => $user); // another level ^ } $res['return_data']['items'][] = $usersArray; } echo json_encode($res, JSON_PRETTY_PRINT);