Is it possible to pass a PHP userland function as a callbak in a COM interface.

Hi. I'm playing with a COM exposed OCR tool. One of the methods of the COM interface requires a callback. The VB and C++ examples simply supply the address of the function to the method ... (VB) ret = objOCR.OCRSetOutputHandlerX(AddressOf myOutputHandler) (C++) OCRSetOutputHandler(myOutputHandler); (NOTE: that is a straight cut'n'paste from their dox - I don't think the C++ example is complete, but you get the idea). So, in PHP, create_function() creates a "lambda_n" and function() creates a "closure". Trying to pass the either of these (with or without &) results in an exception. Pretty much as expected. Is there any way of passing this? At the moment I don't think so, but I may be wrong. I think we need a more direct way of exposing the PHP function, OR to have a callback type which proxies the callback from the COM layer to the php userland code. As I understand things, a function call essentially puts the params on a stack/heap, switches execution point to the function. The function retrieves the params from the stack/heap and carries on executing. As the PHP userland "function" isn't available in the same way, a proxy seems to be the only way I could think of. But, this is WAY out of my skill set (I'm remembering my c coding from over 25 years ago - eek!). Any ideas, suggestions, etc. Regards, Richard Quadling. -- ----- Richard Quadling "Standing on the shoulders of some very clever giants!" EE : http://www.experts-exchange.com/M_248814.html Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731 ZOPA : http://uk.zopa.com/member/RQuadling