Getting XML tag name

[kelphis]

i have a PHP program that getts XML from a file

$xml_in = simplexml_load_file($WebPathOut.$filename);

the XML that is returned has element tag names that represent a description of the data it holds. For examle some XML might be:

<Phone_Number>
454-322-3534
</Phone_Number>

I want to be able to extract the tag name to that i can have some descirption to display to the user like :

Phone_Number: 454-322-3534