nextcloud-server/settings/ajax/getlog.php

<?php
/**
 * Copyright (c) 2012, Robin Appelman <icewind1991@gmail.com>
 * This file is licensed under the Affero General Public License version 3 or later.
 * See the COPYING-README file.
 */

OC_JSON::checkAdminUser();

$count=(isset($_GET['count']))?$_GET['count']:50;
$offset=(isset($_GET['offset']))?$_GET['offset']:0;

$entries=OC_Log_Owncloud::getEntries($count, $offset);
$data = array();
foreach($entries as $entry) {
	$data[] = array(
		'level' => OC_Util::sanitizeHTML($entry->level),
		'app' => OC_Util::sanitizeHTML($entry->app),
		'message' => OC_Util::sanitizeHTML($entry->message),
		'time' => OC_Util::sanitizeHTML($entry->time),
	);
}
OC_JSON::success(array(
	"data" => $data,
	"remain"=>(count(OC_Log_Owncloud::getEntries(1, $offset + $offset)) != 0) ? true : false));