Fix #4: extra ->children() should show for prefixed root element

src/simplexml_tree.php

@@ -124,11 +124,19 @@ function _simplexml_tree_recursively_process_node($item, $depth, $include_string
 	}
 
 	// To what namespace does this element belong? Returns array( alias => URI )
+	// For top-level elements, cheat, and say they're in the null namespace, to force a ->children() call
+	if ( $depth == 1 )
+	{
+		$item_ns = array('' => NULL);
+	}
+	else
+	{
 		$item_ns = $item->getNamespaces(false);
 		if ( !$item_ns )
 		{
 			$item_ns = array('' => NULL);
 		}
+	}
 
 	// This returns all namespaces used by this node and all its descendants,
 	// 	whether declared in this node, in its ancestors, or in its descendants

tests/tree-output/basic-default-ns

@@ -1,5 +1,6 @@
 SimpleXML object (1 item)
 [0] // <movies>
+	->children('', true)
 		->movie[0]
 			->title[0]
 			->characters[0]