diff -Nur Examples/php/callback.orig/example.php Examples/php/callback/example.php
--- Examples/php/callback.orig/example.php	2009-06-17 12:03:17.000000000 +0200
+++ Examples/php/callback/example.php	2009-06-17 18:01:32.000000000 +0200
@@ -42,8 +42,13 @@
 		Callback_run($this->_cPtr);
 	}
 
-	function __construct() {
-		$this->_cPtr=new_Callback();
+        function __construct() {
+          if (get_class($this) === "Callback") {
+            $_this = null;
+          } else {
+            $_this = $this;
+          }
+          $this->_cPtr=new_Callback($_this);
 	}
 }
 
diff -Nur Examples/php/callback.orig/example_wrap.cxx Examples/php/callback/example_wrap.cxx
--- Examples/php/callback.orig/example_wrap.cxx	2009-06-17 12:03:17.000000000 +0200
+++ Examples/php/callback/example_wrap.cxx	2009-06-17 18:18:47.000000000 +0200
@@ -1063,6 +1063,37 @@
 # define SWIG_exception(code, msg) { zend_throw_exception(NULL, (char*)msg, code TSRMLS_CC); }
 #endif
 
+namespace Swig {
+  class Director {
+    public:
+      zval *swig_self;
+      Director(zval* self) : swig_self(self) {
+      }
+  };
+}
+
+#include "example_wrap.h"
+
+SwigDirector_Callback::SwigDirector_Callback(zval *self): Callback(), Swig::Director(self) {
+}
+
+SwigDirector_Callback::~SwigDirector_Callback() {
+}
+
+void SwigDirector_Callback::run() {
+  if (!swig_self) {
+     SWIG_PHP_Error(E_ERROR, "this pointer is NULL");
+  }
+  zval retval, funcname;
+
+  ZVAL_STRING(&funcname, (char *)"run", 0);
+
+  call_user_function(EG(function_table), &swig_self, &funcname,
+      &retval, 0, NULL TSRMLS_CC);
+  return;
+fail:
+  zend_error(SWIG_ErrorCode(),"%s",SWIG_ErrorMsg());
+}
 
 #include <stdexcept>
 
@@ -1137,14 +1168,23 @@
 
 
 ZEND_NAMED_FUNCTION(_wrap_new_Callback) {
+  zval *arg1;
+  zval **args[1];
   Callback *result = 0 ;
   
   SWIG_ResetError();
-  if(ZEND_NUM_ARGS() != 0) {
+  if(ZEND_NUM_ARGS() != 1 || zend_get_parameters_array_ex(1, args) != SUCCESS) {
     WRONG_PARAM_COUNT;
   }
-  
-  result = (Callback *)new Callback();
+
+  arg1 = *args[0];
+
+  if ( arg1->type != IS_NULL ) {
+    /* subclassed */
+    result = (Callback *)new SwigDirector_Callback(arg1);
+  } else {
+    result = (Callback *)new Callback();
+  }
   
   SWIG_SetPointerZval(return_value, (void *)result, SWIGTYPE_p_Callback, 1);
   
diff -Nur Examples/php/callback.orig/example_wrap.h Examples/php/callback/example_wrap.h
--- Examples/php/callback.orig/example_wrap.h	1970-01-01 01:00:00.000000000 +0100
+++ Examples/php/callback/example_wrap.h	2009-06-17 18:17:42.000000000 +0200
@@ -0,0 +1,11 @@
+#ifndef SWIG_example_WRAP_H_
+#define SWIG_example_WRAP_H_
+
+class SwigDirector_Callback : public Callback, public Swig::Director {
+	public:
+		SwigDirector_Callback(zval *self);
+                virtual ~SwigDirector_Callback();
+                virtual void run();
+};
+
+#endif