2 Questions Re: Anonymous Functions

I'm extracting a list of items from an XML document using PHP. The desired items are the attributes of different occurances of a specific element within the document; the code will not need a callback for character data or for closing tags. $list = new Array(); function start_tag($p_id, $element, $attribs) { global $list; if ($element = 'building') $list[] = $attribs['address']; return true; } //.. snip .. snip .. xml_set_element_handler($parser, 'start_tag', create_function ('','')); //.. snip .. snip .. Two questions: 1. create_function ('',''); works just fine, but I was wondering if there was a proper way to declare a void anonymous function? 2. If I were to place the parser related code within it's own function to increase readability of the script, how would start_tag be rewritten as an inline anonymous function? I've tried several ideas but I'm not sure how to handle $location and it's change in scope. Thanks in advance, -Tim