<?php
$pingUrl = 'https://watchcron.com/ping/your-uuid';

// Your work here
processData();

// Ping on success
file_get_contents($pingUrl);

<?php
function ping(string $url): void {
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT, 10);
    curl_exec($ch);
    curl_close($ch);
}

$pingUrl = 'https://watchcron.com/ping/your-uuid';

ping("$pingUrl/start");

try {
    processData();
    ping($pingUrl);
} catch (Exception $e) {
    ping("$pingUrl/fail");
    throw $e;
}

<?php
use GuzzleHttp\Client;

$client = new Client(['timeout' => 10]);
$pingUrl = 'https://watchcron.com/ping/your-uuid';

$client->get("$pingUrl/start");

try {
    processOrders();
    $client->get($pingUrl);
} catch (Throwable $e) {
    $client->post("$pingUrl/fail", [
        'body' => $e->getMessage()
    ]);
    throw $e;
}