servo-php / fluidxml

                return [];

        }

        protected function stringStringHandler($parent, $k, $v, $fn)

        {

                if (! \is_string($k) || ! \is_string($v)) {

                        return false;

                }

                // The user has passed an element name and an element value:

                // [ 'element' => 'Element content' ]

                $el = $this->createElement($k, $v);

                $el = \call_user_func($fn, $parent, $el);

                return [ $el ];

        }

        protected function stringMixedHandler($parent, $k, $v, $fn, $optionals)

        {

                return $context;

        }

        protected function integerStringNotXmlHandler($parent, $k, $v, $fn)

        {

                if (! \is_int($k) || ! \is_string($v) || is_an_xml_string($v)) {

                        return false;

                }

                // The user has passed a node name without a node value:

                // [ 'element', ... ]

                $el = $this->createElement($v);

                $el = \call_user_func($fn, $parent, $el);

                return [ $el ];

        }

        protected function integerXmlHandler($parent, $k, $v, $fn)

        {