Podlove Publisher: Enable Podtrac Support

podtrac.php

<?php

// see https: //analytics.podtrac.com/how-to-measure/
add_filter('podlove_enclosure_url', function ($original_url) {
    $ext            = pathinfo($original_url, PATHINFO_EXTENSION);
    $schemeless_url = preg_replace('/^https?:\/\//', '', $original_url);
    $podtrac_prefix = "https://dts.podtrac.com/redirect.$ext/";
    return $podtrac_prefix . $schemeless_url;
});