PHP Call-time pass-by-reference unavoidable?

Question

Given the following interface:

interface ISoapInterface {
  public static function registerSoapTypes( &$wsdl );
  public static function registerSoapOperatio         


        

Answer 1

While call_user_func does not pass parameters by reference, call_user_func_array can.

$callback = array($provider, 'blahblahblah');
call_user_func_array($callback, array( &$server ));

The only real difference is that it expects an array of parameters instead of a list of parameters like call_user_func (similar to the difference between sprintf and vsprintf)...