DOMImplementation::hasFeature

<?php

$features = array(
  'Core'           => 'Core module',
  'XML'            => 'XML module',
  'HTML'           => 'HTML module',
  'Views'          => 'Views module',
  'Stylesheets'    => 'Style Sheets module',
  'CSS'            => 'CSS module',
  'CSS2'           => 'CSS2 module',
  'Events'         => 'Events module',
  'UIEvents'       => 'User interface Events module',
  'MouseEvents'    => 'Mouse Events module',
  'MutationEvents' => 'Mutation Events module',
  'HTMLEvents'     => 'HTML Events module',
  'Range'          => 'Range module',
  'Traversal'      => 'Traversal module'
);
               
$implementation = new DOMImplementation;

foreach ($features as $key => $name) {
  if ($implementation->hasFeature($key, '2.0')) {
    echo "$name の機能を保持しています\n";
  } else {
    echo "$name の機能は保持していません\n";
  }
}

?>