/usr/bin/trean-url-checker is in php-horde-trean 1.1.4-1build1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45  | #!/usr/bin/php
<?php
/**
 *
 * Copyright 2005-2016 Horde LLC (http://www.horde.org/)
 *
 * See the enclosed file LICENSE for license information (BSD). If you did not
 * did not receive this file, see http://www.horde.org/licenses/bsdl.php.
 *
 * @author Ben Chavet <ben@horde.org>
 * @author Chuck Hagenbuch <chuck@horde.org>
 */
if (file_exists(__DIR__ . '/../../trean/lib/Application.php')) {
    $baseDir = __DIR__ . '/../';
} else {
    require_once 'PEAR/Config.php';
    $baseDir = PEAR_Config::singleton()
        ->get('horde_dir', null, 'pear.horde.org') . '/trean/';
}
require_once $baseDir . 'lib/Application.php';
Horde_Registry::appInit('trean', array('cli' => true));
$factory = $injector->getInstance('Horde_Core_Factory_HttpClient');
$params = array('request.redirect' => false);
$ids = $trean_db->selectValues('SELECT bookmark_id FROM trean_bookmarks');
foreach ($ids as $bookmark_id) {
    $bookmark = $trean_gateway->getBookmark($bookmark_id);
    try {
        $response = $factory->create($params)->head($bookmark->url);
    } catch (Horde_Http_Exception $e) {
        $bookmark->http_status = 'error';
        continue;
    }
    $bookmark->http_status = $response->code;
    // If we've been redirected, update the bookmark's URL.
    if ($location = $response->getHeader('Location') &&
        $location != $bookmark->url) {
        $bookmark->url = $location;
    }
    $bookmark->save(false);
}
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