Parse Pohoda categories XML. The XML contains nested namespaces. Reused code from https://webtrh.cz/120959-parsovani-vnorenych-zaznamu-xml?p=616757#post616757 Alternative parsing can be found at https://gist.github.com/lynt-smitka/6a50bdf97bb32a64e34b

parse_pohoda_categories_xml.php

$xml = file_get_contents($_FILES['xml']['tmp_name']);
$xml = simplexml_load_string($xml);
$ns = $xml->getNameSpaces(true);

foreach ($xml->xpath('//lst:categoryDetail') as $categories) {
    $ctg = $categories->children($ns['ctg']);
    foreach ($ctg->category as $category) {
        insert_page($category->id, $category->name, 0);
        if (isset($category->subCategories)) {
            insertSubcategory($category);
        }
    }
}

function insertSubcategory($category) {
    foreach ($category->subCategories->category as $subcategory) {
        insert_page($subcategory->id, $subcategory->name, $category->id);
        if (isset($subcategory->subCategories)) {
            insertSubcategory($subcategory);
        }
    }
}