PHP - Manual: DOMNode::isSupported
2025-10-31
(PHP 5, PHP 7, PHP 8)
DOMNode::isSupported — Checks if feature is supported for specified version
   Checks if the asked feature is supported for the 
   specified version.
  
featureThe feature to test. See the example of DOMImplementation::hasFeature() for a list of features.
version
       The version number of the feature to test.