How to check if string is a valid XML element name?

Posted by xsaero00 on Stack Overflow See other posts from Stack Overflow or by xsaero00
Published on 2010-03-25T22:20:57Z Indexed on 2010/03/25 22:23 UTC
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php

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regex

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Xml

I need a regex or a function in PHP that will validate a string to be a good XML element name.

Form w3schools:

XML elements must follow these naming rules:

Names can contain letters, numbers, and other characters

Names cannot start with a number or punctuation character

Names cannot start with the letters xml (or XML, or Xml, etc)

Names cannot contain spaces

I can write a basic regex that will check for rules 1,2 and 4, but it won't account for all punctuation allowed and won't account for 3rd rule

\w[\w0-9-]

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