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--TEST--
Dom\Node::insertBefore() with DocumentFragment and dtd
--EXTENSIONS--
dom
--FILE--
<?php
$dom = Dom\HTMLDocument::createFromString('<!DOCTYPE html><html><head></head><body></body></html>');
$dom->documentElement->remove();
$fragment = $dom->createDocumentFragment();
$fragment->appendChild($dom->createElement('a'));
try {
$dom->insertBefore($fragment, $dom->doctype);
} catch (DOMException $e) {
echo $e->getMessage(), "\n";
}
echo $dom->saveHtml(), "\n";
?>
--EXPECT--
Document types must be the first child in a document
<!DOCTYPE html>
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