LiteXiv/api/multi_artworks.php

<?php
require_once __DIR__ . '/../include/config.php';
require_once __DIR__ . '/../include/api.php';

header('Content-Type: application/json');

if (!isset($_GET['ids']) || !is_array($_GET['ids']) || count($_GET['ids']) > 50) {
	http_response_code(400);
	die('[]');
}
foreach($_GET['ids'] as $id) {
	if (!ctype_digit($id)) {
		http_response_code(400);
		die('[]');
	}
}

/* `11`: intentional, must be a valid user id for the endpoint to work */
list($artworks, $error) = get_user_artworks(11, $_GET['ids']);
if ($error) {
	http_response_code(500);
	die('[]');
}

echo json_encode($artworks->body->works);