That's bad for readability (harder for the user to figure out which one of his cards was used), and it's bad security (since the number could be obtained over time or if multiple retailers did this). And of course, there's are times when two, one and even no digits are hidden.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
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intervention).
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or How to display code and escape characters
are good places to start.
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