Add test for inherited simplexml classes

ext/simplexml/tests/010.phpt

@@ -0,0 +1,47 @@
+--TEST--
+SimpleXML: Simple Inheritance
+--SKIPIF--
+<?php if (!extension_loaded("simplexml")) print "skip"; ?>
+--FILE--
+<?php 
+
+class simplexml_inherited extends simplexml_element
+{
+}
+
+$sxe = simplexml_load_file(dirname(__FILE__).'/sxe.xml', 'simplexml_inherited');
+
+print_r($sxe);
+
+echo "---Done---\n";
+
+?>
+--EXPECT--
+simplexml_inherited Object
+(
+    [elem1] => simplexml_inherited Object
+        (
+            [comment] => simplexml_inherited Object
+                (
+                )
+
+            [elem2] => simplexml_inherited Object
+                (
+                    [elem3] => simplexml_inherited Object
+                        (
+                            [elem4] => simplexml_inherited Object
+                                (
+                                    [test] => simplexml_inherited Object
+                                        (
+                                        )
+
+                                )
+
+                        )
+
+                )
+
+        )
+
+)
+---Done---