<?php

$list = new \Concrete\Core\Page\PageList();
$list->ignorePermissions();
$pages = $list->getResults();

$count = 0;

/** @var \Concrete\Core\Page\Page $page */
foreach ($pages as $page) {
    $page->clearPagePaths();
    $page->rescanCollectionPath();
    ++$count;
}

echo sprintf('%d pages rescanned.', $count);