3v4l.org

run code in 200+ php & hhvm versions
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<?php $html = <<<HTML <form method="post"> <button>Hello</button> </form> HTML; $document = new DOMDocument("1.0", "utf-8"); $f = $document->createDocumentFragment(); $f->appendXML($html); var_dump($f->firstChild);
based on jmMBN
Output for 7.0.16 - 7.0.20, 7.1.2 - 7.2.6
object(DOMElement)#3 (18) { ["tagName"]=> string(4) "form" ["schemaTypeInfo"]=> NULL ["nodeName"]=> string(4) "form" ["nodeValue"]=> string(11) " Hello " ["nodeType"]=> int(1) ["parentNode"]=> string(22) "(object value omitted)" ["childNodes"]=> string(22) "(object value omitted)" ["firstChild"]=> string(22) "(object value omitted)" ["lastChild"]=> string(22) "(object value omitted)" ["previousSibling"]=> NULL ["nextSibling"]=> NULL ["attributes"]=> string(22) "(object value omitted)" ["ownerDocument"]=> string(22) "(object value omitted)" ["namespaceURI"]=> NULL ["prefix"]=> string(0) "" ["localName"]=> string(4) "form" ["baseURI"]=> NULL ["textContent"]=> string(11) " Hello " }
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.0.15, 7.1.0 - 7.1.1
object(DOMElement)#3 (17) { ["tagName"]=> string(4) "form" ["schemaTypeInfo"]=> NULL ["nodeName"]=> string(4) "form" ["nodeValue"]=> string(11) " Hello " ["nodeType"]=> int(1) ["parentNode"]=> string(22) "(object value omitted)" ["childNodes"]=> string(22) "(object value omitted)" ["firstChild"]=> string(22) "(object value omitted)" ["lastChild"]=> string(22) "(object value omitted)" ["previousSibling"]=> NULL ["attributes"]=> string(22) "(object value omitted)" ["ownerDocument"]=> string(22) "(object value omitted)" ["namespaceURI"]=> NULL ["prefix"]=> string(0) "" ["localName"]=> string(4) "form" ["baseURI"]=> NULL ["textContent"]=> string(11) " Hello " }
Output for hhvm-3.15.4
object(DOMElement)#3 (18) { ["nodeName"]=> string(4) "form" ["nodeValue"]=> string(11) " Hello " ["nodeType"]=> int(1) ["parentNode"]=> string(22) "(object value omitted)" ["childNodes"]=> string(22) "(object value omitted)" ["firstChild"]=> string(22) "(object value omitted)" ["lastChild"]=> string(22) "(object value omitted)" ["previousSibling"]=> NULL ["nextSibling"]=> NULL ["attributes"]=> string(22) "(object value omitted)" ["ownerDocument"]=> string(22) "(object value omitted)" ["namespaceURI"]=> NULL ["prefix"]=> string(0) "" ["localName"]=> string(4) "form" ["baseURI"]=> NULL ["textContent"]=> string(11) " Hello " ["tagName"]=> string(4) "form" ["schemaTypeInfo"]=> NULL }