On DZone.com there's a recent post from Evert Pot talking about some guidelines for generating XML including a brief PHP example.
Over the last little while I've come across quite a few XML feed generators written in PHP, with varying degrees of 'correctness'. Even though generating XML should be very simple, there's still quite a bit of pitfalls I feel every PHP or (insert your language)-developer should know about.
His suggestions for better XML include:
- You are better off using an XML library (like xmlwriter)
- Understand Unicode
- CDATA is never a solution
- Be verbose
- Be careful with entities
