After quite a quiet spell I am once again able to post a quick tip and share a little of what I've learnt in the world of web development. I hope this post will prove helpful to someone. Please note that in this tip I'm assuming that you have used Kohana's Validation Library before and you found this tip after having problems with upload validation. Kohana's validation library is pretty cool and can do all sorts of things that would take a bit of time using 'standard PHP.'

Suppose you wanted y...
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