[WP] Custom taxonomy dropdown menu

custom-tax-dropdown.php

<?php
    $dropdown_taxonomy = 'YOUR_TAXONOMY_NAME';
    $dropdown_terms = get_terms($dropdown_taxonomy);
    $archive_url = home_url('/'); // change this to the URL the user should go to if they select "All"

    if (!empty($dropdown_terms)) :
?>
    <select id="term-dropdown" class="term-dropdown">
        <option value="<?php echo $archive_url; ?>">All</option>
    <?php foreach ($dropdown_terms as $dropdown_term) : ?>
        <option value="<?php echo get_term_link($dropdown_term); ?>"
            <?php echo is_tax($dropdown_taxonomy, $dropdown_term->term_id) ? ' selected' : ''; ?>>
            <?php echo $dropdown_term->name; ?>
        </option>
    <?php endforeach; ?>
    </select>

    <script>
        <!--
        var termSwitchDropdown = document.getElementById('term-dropdown');
        termSwitchDropdown.onchange = function() {
            location.href = termSwitchDropdown.options[termSwitchDropdown.selectedIndex].value;
        };
        -->
    </script>
<?php endif; ?>