Test if HHVM still uses __get/__set or has implemented the properties.

hhvm_getter.php

<?php

$xml = <<<'XML'
<root attribute="42"></root>
XML;

$dom = new DOMDocument();
$dom->preserveWhiteSpace = FALSE;
$dom->loadXml($xml);

$objects = [
    $dom,
    $dom->documentElement,
    $dom->documentElement->attributes->getNamedItem('attribute'),
    $dom->createTextNode(''),
    $dom->createComment(''),
    $dom->createCDATASection(''),
    $dom->createProcessingInstruction('pi', ''),
    $dom->createDocumentFragment(),
    new DOMXPath($dom)
];

echo str_pad('class', 25, ' '), ' | ', '__get ', ' | ', '__set ', "\n";
echo str_repeat('-', 25), ' | ', '------', ' | ', '------', "\n";

foreach ($objects as $object) {
  echo
    str_pad(get_class($object), 25, ' '),
    ' | ',
    method_exists($object, '__get') ? 'true  ' : 'false ',
    ' | ',
    method_exists($object, '__set') ? 'true  ' : 'false ',
    "\n";
}