Insert new data into XML file with PHP

[hbradshaw]

Hello:

I have a customer XML file containing some basic customer information.

I have a PHP form where I can input information for new customers. I want the information from the form to be posted into the customer XML file.

How do I update my current customer XML file with the information for new customers being submitted by the form?

I know how to accomplish this using database tables but I can't find any information on how to insert new data into existing XML files.

Thank you in advance.