paad/service/periodos.v1.php

<?
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

$ruta = "../";
require_once '../include/bd_pdo.php';
$curl = curl_init();
global $db;
curl_setopt_array($curl, [
    CURLOPT_URL => "https://portal.ulsa.edu.mx/servicios/AuditoriaAsistencialRest/AuditoriaAsistencialService.svc/auditoriaAsistencial/catalogos/periodos/v1/seleccionar",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POSTFIELDS => "",
    CURLOPT_HTTPHEADER => [
        "token: 5b892845736a29b5846073be0a11f0fc87113648aae1e8279830c4bc05f585eba13e0b1b4f0c42a12d694bb8091d23f7564b15f3141768dfa6ed2aa709864986",
        "username: SGU_APSA_AUD_ASIST"
    ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err)
    die("cURL Error #:$err");

$data = json_decode($response, true);

$in_db = array_map(function ($item) use ($db) {
    $item['in_db'] = $db->where('id_periodo_sgu', $item['IdPeriodo'])->has('periodo');
    return $item;
}, $data);

$selectedData = array_unique($in_db, SORT_REGULAR);

// Output the selected data directly
header('Content-Type: application/json');
echo json_encode($selectedData, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);