fix getElementsByTagname iteration

Author: Rob Richards

ext/dom/dom_iterators.c

@@ -183,11 +183,11 @@ static void php_dom_iterator_move_forward(zend_object_iterator *iter TSRMLS_DC)
 {
 	zval *curobj, *curattr = NULL;
 	zval *object;
-	xmlNodePtr curnode = NULL;
+	xmlNodePtr curnode = NULL, basenode;
 	dom_object *intern;
 	dom_object *nnmap;
 	dom_nnodemap_object *objmap;
-	int ret, previndex=0;
+	int ret, previndex=1;
 
 	php_dom_iterator *iterator = (php_dom_iterator *)iter;
 
@@ -203,8 +203,12 @@ static void php_dom_iterator_move_forward(zend_object_iterator *iter TSRMLS_DC)
 			if (objmap->nodetype == XML_ATTRIBUTE_NODE || objmap->nodetype == XML_ELEMENT_NODE) {
 				curnode = curnode->next;
 			} else {
-				previndex = iter->index - 1;
-				curnode = dom_get_elements_by_tag_name_ns_raw(curnode, objmap->ns, objmap->local, &previndex, iter->index);
+				/* Nav the tree evey time as this is LIVE */
+				basenode = dom_object_get_node(objmap->baseobj);
+				if (basenode && (basenode->type == XML_DOCUMENT_NODE || basenode->type == XML_HTML_DOCUMENT_NODE)) {
+					basenode = xmlDocGetRootElement((xmlDoc *) basenode);
+				}
+				curnode = dom_get_elements_by_tag_name_ns_raw(basenode, objmap->ns, objmap->local, &previndex, iter->index);
 			}
 		} else {
 			if (objmap->nodetype == XML_ENTITY_NODE) {

ext/dom/php_dom.c

@@ -1092,18 +1092,20 @@ xmlNode *dom_get_elements_by_tag_name_ns_raw(xmlNodePtr nodep, char *ns, char *l
 	xmlNodePtr ret = NULL;
 
 	while (nodep != NULL && (*cur <= index || index == -1)) {
-		if (nodep->type == XML_ELEMENT_NODE && xmlStrEqual(nodep->name, local)) {
-			if (ns == NULL || (nodep->ns != NULL && xmlStrEqual(nodep->ns->href, ns))) {
-				if (*cur == index) {
-					ret = nodep;
-					break;
+		if (nodep->type == XML_ELEMENT_NODE) {
+			if (xmlStrEqual(nodep->name, local)) {
+				if (ns == NULL || (nodep->ns != NULL && xmlStrEqual(nodep->ns->href, ns))) {
+					if (*cur == index) {
+						ret = nodep;
+						break;
+					}
+					(*cur)++;
 				}
-				(*cur)++;
 			}
-		}
-		ret = dom_get_elements_by_tag_name_ns_raw(nodep->children, ns, local, cur, index);
-		if (ret != NULL) {
-			break;
+			ret = dom_get_elements_by_tag_name_ns_raw(nodep->children, ns, local, cur, index);
+			if (ret != NULL) {
+				break;
+			}
 		}
 		nodep = nodep->next;
 	}