endpoint.php

<?php
if ($_GET['action'] == 'channels') {
$channels = array(
array('uid' => 'notifications', 'name' => 'Notifications'),
array('uid' => 'home', 'name' => 'Home'),
);
header('Content-Type: application/json');
echo json_encode(array('channels' => $channels));
}
elseif ($_GET['action'] == 'timeline') {
$uid = $_GET['channel'];
$items = array();
if ($uid == 'notifications') {
$items[] = array(
'type' => 'entry',
'name' => 'Notification',
'content' => array(
'text' => 'simple text version',
'html' => 'simple <b>HTML</b> version',
),
'url' => 'https://example.com/1',
'published' => '2018-07-22T13:11:00+02:00',
'_id' => '1',
'_read'=> false,
);
} elseif ($uid == 'home') {
// add items to $items array ...
}
header('Content-Type: application/json');
echo json_encode(array('items' => $items, 'paging'=>array()));
}