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run code in 150+ php & hhvm versions
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<?php class Xpath extends DOMXpath { } $dom = new DOMDocument(); $xpath = new Xpath($dom); var_dump($xpath->document);
Output for 5.3.11 - 5.3.29, 5.4.1 - 5.6.28, 7.0.0 - 7.1.0
object(DOMDocument)#1 (34) { ["doctype"]=> NULL ["implementation"]=> string(22) "(object value omitted)" ["documentElement"]=> NULL ["actualEncoding"]=> NULL ["encoding"]=> NULL ["xmlEncoding"]=> NULL ["standalone"]=> bool(true) ["xmlStandalone"]=> bool(true) ["version"]=> string(3) "1.0" ["xmlVersion"]=> string(3) "1.0" ["strictErrorChecking"]=> bool(true) ["documentURI"]=> NULL ["config"]=> NULL ["formatOutput"]=> bool(false) ["validateOnParse"]=> bool(false) ["resolveExternals"]=> bool(false) ["preserveWhiteSpace"]=> bool(true) ["recover"]=> bool(false) ["substituteEntities"]=> bool(false) ["nodeName"]=> string(9) "#document" ["nodeValue"]=> NULL ["nodeType"]=> int(9) ["parentNode"]=> NULL ["childNodes"]=> string(22) "(object value omitted)" ["firstChild"]=> NULL ["lastChild"]=> NULL ["previousSibling"]=> NULL ["attributes"]=> NULL ["ownerDocument"]=> NULL ["namespaceURI"]=> NULL ["prefix"]=> string(0) "" ["localName"]=> NULL ["baseURI"]=> NULL ["textContent"]=> string(0) "" }
Output for hhvm-3.12.0
object(DOMDocument)#1 (35) { ["nodeName"]=> string(9) "#document" ["nodeValue"]=> NULL ["nodeType"]=> int(9) ["parentNode"]=> NULL ["childNodes"]=> string(22) "(object value omitted)" ["firstChild"]=> NULL ["lastChild"]=> NULL ["previousSibling"]=> NULL ["nextSibling"]=> NULL ["attributes"]=> NULL ["ownerDocument"]=> NULL ["namespaceURI"]=> NULL ["prefix"]=> string(0) "" ["localName"]=> NULL ["baseURI"]=> NULL ["textContent"]=> string(0) "" ["doctype"]=> NULL ["implementation"]=> string(22) "(object value omitted)" ["documentElement"]=> NULL ["actualEncoding"]=> NULL ["encoding"]=> NULL ["xmlEncoding"]=> NULL ["standalone"]=> bool(true) ["xmlStandalone"]=> bool(true) ["version"]=> string(3) "1.0" ["xmlVersion"]=> string(3) "1.0" ["strictErrorChecking"]=> bool(true) ["documentURI"]=> NULL ["config"]=> NULL ["formatOutput"]=> bool(false) ["validateOnParse"]=> bool(false) ["resolveExternals"]=> bool(false) ["preserveWhiteSpace"]=> bool(true) ["recover"]=> bool(false) ["substituteEntities"]=> bool(false) }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.3.10, 5.4.0
object(DOMDocument)#1 (0) { }
Output for 4.3.2 - 4.4.9
Fatal error: Class xpath: Cannot inherit from undefined class domxpath in /in/ut14J on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Class xpath: Cannot inherit from undefined class domxpath in /in/ut14J on line 3