Description:
------------
I've got this PHP code:

$xml = simplexml_load_file('file.xml');

foreach($xml-> children() as $name => $item){
  echo $name.'<br/>';
}

It was working with older PHP 5 snapshots (as I know, from January). But: I have installed the newest PHP snapshot, and it returns:

Fatal error: Call to undefined method simplexml_element::children() in myfile.php on line xxx

The same problem is with "xpath()" method. 

Reproduce code:
---------------
<?php
$xml = simplexml_load_string(
'<person>
 <child role="son">
  <child role="daughter"/>
 </child>
 <child role="daughter">
  <child role="son">
   <child role="son"/>
  </child>
 </child>
</person>');

foreach ($xml->children() as $second_gen) {
   echo ' The person begot a ' . $second_gen['role'];

   foreach ($second_gen->children() as $third_gen) {
       echo ' who begot a ' . $third_gen['role'] . ';';
   
       foreach ($third_gen->children() as $fourth_gen) {
           echo ' and that ' . $third_gen['role'] .
               ' begot a ' . $fourth_gen['role'];
       }
   }
}
?>

Expected result:
----------------
The person begot a son who begot a daughter; The person
begot a daughter who begot a son; and that son begot a son


Actual result:
--------------
Fatal error: Call to undefined method simplexml_element::children() in file etc. etc.