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Display last four digits of a credit card number

user545194Aug 23 2009 — edited Aug 23 2009
Hi!

How can I display the last four digits of a credit card number with x or asterix masking the other digits?

I.E.
xxxx-xxxx-xxxx-1234

Thanks for suggestions or scripts!
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Locked on Sep 20 2009
Added on Aug 23 2009
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