librenms-librenms/includes/polling/applications.inc.php

<?php

$app_rows = dbFetchRows('SELECT * FROM `applications` WHERE `device_id`  = ?', [$device['device_id']]);

if (count($app_rows) > 0) {
    foreach ($app_rows as $app) {
        $app_include = \LibreNMS\Config::get('install_dir') . '/includes/polling/applications/' . $app['app_type'] . '.inc.php';
        if (is_file($app_include)) {
            include $app_include;
        } else {
            echo $app['app_type'] . ' include missing! ';
        }
    }
    echo "\n";
}

unset($app_rows);