Alert acknowledgement for LibreNMS

ack.php

<?php

/*
 * LibreNMS
 *
 * Copyright (c) 2018 Olegs Vasiljevs <https://github.com/angryp>
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version. 
 * 
 * Place this in html directory of your LibreNMS install path. 
 *
 * Usage: 
 * open https://your.librenms.address/ack.php?rule_id=1&device_id=1
 * where rule_id and device_id are variables that should be expanded from 
 * alert template in LibreNMS.
 */

$base_url = 'https://your.librenms.address/api/v0/alerts';
$rule_id = $_GET['rule_id'];
$device_id = $_GET['device_id'];
$alert_id = "";

$url = ($base_url . '?state=1');
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('X-Auth-Token: YourLibreNMSAPITokenHere'));

$output = json_decode(curl_exec($ch), true);

for($x=0; $x<count($output['alerts']); $x++){
    if($output['alerts'][$x]['device_id']==$device_id and $output['alerts'][$x]['rule_id']==$rule_id){
        $alert_id = ($output['alerts'][$x]['id']);
    }
}

$url = ($base_url . '/' . $alert_id);
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_PUT, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('X-Auth-Token: YourLibreNMSAPITokenHere'));

$output = json_decode(curl_exec($ch), true);

if($output['message'] == "This API route doesn't exist."){
    echo "This alert is not active anymore.";
} else {
    print($output['message']);
}

?>