
Delete duplicate email addresses

I'm quite new to php but I've been asked to write a script to remove duplicate email addresses.
I've got a prototype running here Delete Duplicate Email Addresses.
It doesn't look pretty - but as I said, it's a prototype.
I hope it's not out of line to as for some input on this?
I was just wondering if you think it's ok as it is? Or are there any improvements that you would think worthwhile?
Many thanks for any input

(Also if this is the wrong forum, sorry please move me.)
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Karen Barr -
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achaa -
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gepisar -
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achaa -
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