breadcrumbs.php

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<?php
if (isset($vars['breadcrumbs'])) {
    $breadcrumbs = $vars['breadcrumbs'];
} else {
    $breadcrumbs = elgg_get_breadcrumbs();
}

if (!is_array($breadcrumbs) || !$breadcrumbs) {
    return;
}

$attrs['class'] = elgg_extract_class($vars, ['elgg-menu', 'elgg-breadcrumbs']);
$lis = '';

foreach ($breadcrumbs as $breadcrumb) {
    // We have to escape text (without double-encoding). Titles in core plugins are HTML escaped
    // on input, but we can't guarantee that other users of this view and of elgg_push_breadcrumb()
    // will do so.
    if (!empty($breadcrumb['link'])) {
        $crumb = elgg_view('output/url', array(
            'href' => $breadcrumb['link'],
            'text' => $breadcrumb['title'],
            'encode_text' => true,
            'is_trusted' => true,
        ));
    } else {
        $crumb = htmlspecialchars($breadcrumb['title'], ENT_QUOTES, 'UTF-8', false);
    }

    $lis .= "<li>$crumb</li>";
}

echo elgg_format_element('ul', $attrs, $lis);