strip outer element, ie. remove parent with php parser [duplicate]

Answer 1

Shouldn't $span->parentNode->parentNode->replaceChild($h1, $span->parentNode); do what you want?

In order to add a node after a given node, you can use something like (untested!):

if ($h1->nextSibling) {
    $h1->parentNode->insertBefore($h1->nextSibling, $dom->createElement('br'));
} else {
    $h1->parentNode->appendChild($dom->createElement('br'));
}