DOMImplementation->hasFeature Test if the DOM implementation implements a specific feature &reftitle.description; DOMImplementation bool hasFeature stringfeature stringversion Test if the DOM implementation implements a specific feature. &return.success; You can find a list of all features in the Conformance section of the DOM specification. version is the version number of the feature to test. In level 2, this can be either 2.0 or 1.0. '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' ); foreach ($features as $key => $name) { if (DOMImplementation::hasFeature($key, '2.0')) { echo "Has feature $name\n"; } else { echo "Missing feature $name\n"; } } ?> ]]>