open_muscat; Fatal error: Class declarations may not be nested in /var/www/html/xapian/test.php on line 3

I've got a first revision of the php module for open_muscat (now called xapian). I used swig to generate this. Swig works by declaring a class in the C code and then having a load of methods of this class to do the work, and then some php classes which shadow the C classes but use the new methods of the secret single class to do the actual work. Like: ... $this->_c_ptr=xapianc::new_OmQieryTerm("hi",0,0); ... return xapianc::OmQuery_get_description($this->_c_ptr); and all that kind of thing; The problem is merely loading the xapian module gives this error if even the simplest class is declared (with no include files at all) Fatal error: Class declarations may not be nested in /var/www/html/xapian/test.php on line 3 The same tiny class definitions work fine if the xapian module does not load. I can't find decent docs on internal class declarations but obviously it has not been "closed"; how might I go about doing this? Sam