Ah right, yea thats a great example! I see now, i take it addValidator makes an array of the classes, and then "doValidate" (or something similar) loops through those, checking for a exception and returning the exception if it finds one?

I can see exactly why that works, and how its a great thing :)

One thing though, what happens if say you have 20-30 different string to validate. Surely this method would be a little slow? (Need different instances of Zend_Validate for each different string format?)

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