custom_breadcrumbs.php

// Ejemplo de construcción de custom breadcrumbds.
global $PAGE;
$PAGE->navbar->ignore_active();
$b7string = get_string('B7', 'local_webbook');
$firstnode = $PAGE->navbar->add($b7string, $this->assignmentsurl, navigation_node::TYPE_SECTION);
if (($this->isteamview || $this->studentid > 0) && $this->canmanageactivity) {
    $secondnode = $firstnode->add($this->activity->name, $this->parentactivityurl, navigation_node::NODETYPE_LEAF);
    if ($this->modulename === 'forum') {
        $thirdnode = $secondnode->add($this->currentteam['name'], null, navigation_node::NODETYPE_LEAF);
    } else {
        $thirdnode = $secondnode->add($this->userfullname, null, navigation_node::NODETYPE_LEAF);
    }
    $thirdnode->make_active();
} else {
    $secondnode = $firstnode->add($this->activity->name, null, navigation_node::NODETYPE_LEAF);
    $secondnode->make_active();
}