phpToXml example

$element->setAttribute('on-invalid', 'null');
                } elseif (ContainerInterface::IGNORE_ON_INVALID_REFERENCE == $behavior) {
                    $element->setAttribute('on-invalid', 'ignore');
                } elseif (ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE == $behavior) {
                    $element->setAttribute('on-invalid', 'ignore_uninitialized');
                }
            } elseif ($value instanceof Definition) {
                $element->setAttribute('type', 'service');
                $this->addService($value, null, $element);
            } elseif ($value instanceof Expression) {
                $element->setAttribute('type', 'expression');
                $text = $this->document->createTextNode(self::phpToXml((string) $value));
                $element->appendChild($text);
            } elseif (\is_string($value) && !preg_match('/^[^\x00-\x08\x0B\x0C\x0E-\x1F\x7F]*+$/u', $value)) {
                $element->setAttribute('type', 'binary');
                $text = $this->document->createTextNode(self::phpToXml(base64_encode($value)));
                $element->appendChild($text);
            } elseif ($value instanceof \UnitEnum) {
                $element->setAttribute('type', 'constant');
                $element->appendChild($this->document->createTextNode(self::phpToXml($value)));
            } elseif ($value instanceof AbstractArgument) {
                $element->setAttribute('type', 'abstract');
                $text = $this->document->createTextNode(self::phpToXml($value->getText()));
                

$element->setAttribute('on-invalid', 'null');
                } elseif (ContainerInterface::IGNORE_ON_INVALID_REFERENCE == $behavior) {
                    $element->setAttribute('on-invalid', 'ignore');
                } elseif (ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE == $behavior) {
                    $element->setAttribute('on-invalid', 'ignore_uninitialized');
                }
            } elseif ($value instanceof Definition) {
                $element->setAttribute('type', 'service');
                $this->addService($value, null, $element);
            } elseif ($value instanceof Expression) {
                $element->setAttribute('type', 'expression');
                $text = $this->document->createTextNode(self::phpToXml((string) $value));
                $element->appendChild($text);
            } elseif (\is_string($value) && !preg_match('/^[^\x00-\x08\x0B\x0C\x0E-\x1F\x7F]*+$/u', $value)) {
                $element->setAttribute('type', 'binary');
                $text = $this->document->createTextNode(self::phpToXml(base64_encode($value)));
                $element->appendChild($text);
            } elseif ($value instanceof \UnitEnum) {
                $element->setAttribute('type', 'constant');
                $element->appendChild($this->document->createTextNode(self::phpToXml($value)));
            } elseif ($value instanceof AbstractArgument) {
                $element->setAttribute('type', 'abstract');
                $text = $this->document->createTextNode(self::phpToXml($value->getText()));