fix bug #47848 (importNode doesn't preserve attribute namespaces)

add tests

NEWS

@@ -14,6 +14,7 @@ PHP                                                                        NEWS
 - Fixed bug #49660 (libxml 2.7.3+ limits text nodes to 10MB). (Felipe)
 - Fixed bug #49472 (Constants defined in Interfaces can be overridden).
   (Felipe)
+- Fixed bug #47848 (importNode doesn't preserve attribute namespaces). (Rob)
 - Fixed bug #45120 (PDOStatement->execute() returns true then false for same
   statement). (Pierrick)
 

ext/dom/document.c

@@ -1252,6 +1252,18 @@ PHP_FUNCTION(dom_document_import_node)
 		if (!retnodep) {
 			RETURN_FALSE;
 		}
+
+		if ((retnodep->type == XML_ATTRIBUTE_NODE) && (nodep->ns != NULL)) {
+			xmlNsPtr nsptr = NULL;
+			xmlNodePtr root = xmlDocGetRootElement(docp);
+
+			nsptr = xmlSearchNsByHref (nodep->doc, root, nodep->ns->href);
+			if (nsptr == NULL) {
+				int errorcode;
+				nsptr = dom_get_ns(root, nodep->ns->href, &errorcode, nodep->ns->prefix);
+			}
+			xmlSetNs(retnodep, nsptr);
+		}
 		
 	}
 

ext/dom/tests/bug47848.phpt

@@ -0,0 +1,25 @@
+--TEST--
+Bug #47848 (importNode doesn't preserve attribute namespaces)
+--SKIPIF--
+<?php require_once('skipif.inc'); ?>
+--FILE--
+<?php 
+
+$aDOM = new DOMDocument();
+$aDOM->appendChild($aDOM->createElementNS('http://friend2friend.net/','f2f:a'));
+
+$fromdom = new DOMDocument();
+$fromdom->loadXML('<data xmlns:ai="http://altruists.org" ai:attr="namespaced" />');
+
+$attr= $fromdom->firstChild->attributes->item(0);
+
+$att = $aDOM->importNode($attr);
+
+$aDOM->documentElement->appendChild($aDOM->importNode($attr, true));
+
+echo $aDOM->saveXML();
+
+?>
+--EXPECT--
+<?xml version="1.0"?>
+<f2f:a xmlns:f2f="http://friend2friend.net/" xmlns:ai="http://altruists.org" ai:attr="namespaced"/>