Deprecated: PHP 8.2: Dynamic property when WSDL element names contain invalid PHP identifiers (e.g. dots)

[Smileybob72801]

Describe the bug
When generating classes from a WSDL that contains element names with invalid PHP identifiers (e.g. SomethingAuthorization.SomethingAuthorization), the generated PHP classes do not declare corresponding properties.

At runtime, when SoapClient->__soapCall() hydrates the response, PHP creates a dynamic property with the raw name.

On PHP 8.2, this triggers deprecation warnings like:

WARNING: Creation of dynamic property Example\ArrayType\ArrayOfSomething_SomethingAuthorization:$SomethingAuthorization.SomethingAuthorization is deprecated in ...\Example.php on line...

To Reproduce

1. Generate classes from a WSDL that has element names containing a dot (.).
2. Call the relevant SOAP operation that returns this element.
3. Observe that the object ends up with a dynamic property and PHP emits a deprecation warning.

Expected behavior

• The generator should normalize invalid PHP identifiers into valid property names (e.g. replace . with _).
• The generated class should declare the property explicitly so hydration does not fall back to dynamic properties.

Ideas for fix

• During generation, normalize all invalid identifiers in property names (e.g. . → _).
• Ensure the corresponding declared property is created in the generated class.