Description:
------------
Hi,

I write Soap Webservice consuming by SAP which working only with Document/Literal style. When i change WSDL definition from RPC style to Document I'm starting receiving "Procedure XXX not present".

After change rpc/literal to document/literal I expected that everything will be works. I lookup to the extension source code to looking cause why my methods of class is not visible in SoapServer and found these line:
https://github.com/php/php-src/blob/master/ext/soap/soap.c#L3250

What is the reason of set function = NULL; when function has any parameter?

I write workaround making change like this:

Before:
public function updateCustomer(\stdClass $dataIn): \stdClass
{
    // 
}

After:
public function updateCustomer(): \stdClass
{
    $dataIn = func_get_args()[0];
}