Use PHP objects instead of resources to wrap pointers

Pointer to member is currently still wrapped as a resource.

Lib/php/phpinit.swg

@@ -21,5 +21,6 @@ static int swig_member_ptr = 0;
 %}
 
 %fragment("swig_php_init_member_ptr", "init", fragment="swig_php_init_member_ptr2") %{
+  // FIXME: Make this a class instead
   swig_member_ptr = zend_register_list_destructors_ex(swig_member_ptr_dtor, NULL, SWIG_MEMBER_PTR, module_number);
 %}