yr-forecast/index.php

<?php

require __DIR__ . '/vendor/autoload.php';

$url = 'https://www.yr.no/place/Norway/Troms/Tromsø/Tromsø/forecast_hour_by_hour.xml';

$forecast = new App\Yr\Forecast($url);

echo '<pre>';
var_dump($forecast->getLocation());
foreach ($forecast->getTabular()->getBetween(
    $forecast->getSunset(), $forecast->getSunrise()->add(new \DateInterval('P1D'))
) as $time)
    echo $time . "\n";
?>