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Date: Tue, 10 Mar 2009 12:19:32 -0400
Message-ID: <2009031012193216807-fdintino@nflcorg>
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Subject: Cloning of objects passed as parameters
From: fdintino@nflc.org (Frankie Dintino)

I'm writing a PHP class with a method that has to be passed a 
DOMDocument object, and it needs to retain that object throughout the 
life of its instantiation. However, the (dom_object *) returned from 
zend_parse_method_parameters is just a pointer to the passed object, 
and so it disappears when the original document is unset or goes out of 
scope. How would one go about cloning the DOMDocument to save in the 
class's struct?

example:
ZEND_METHOD(xydelta, setStartDocument) {
	zval *id, *doc = NULL;
	xydelta_object *intern;

	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), 
"Oo", &id, xydelta_ce, &doc) == FAILURE) {
		RETURN_FALSE;
	}

	intern = (xydelta_object *)zend_object_store_get_object(id TSRMLS_CC);
	if (intern != NULL) {	
		// Error checking removed for brevity...
		// ...

		// This pointer cannot be accessed once the object that was used as 
the first parameter goes out of scope
		intern->libxml_start_doc = (php_libxml_node_object *) 
zend_object_store_get_object(doc TSRMLS_CC);
	}
}