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troubleshooting Question

Regular expression for isbn

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arashaga asked on
PerlPHPRegular Expressions
7 Comments1 Solution1015 ViewsLast Modified:
I am not really good at regular expression and I was trying to come up with a regular expression that could validate the isbn numbers in my php code,
I will strip the dashes and spaces from the string so I will make sure that the string has only the digits plus that optional x or X. I was wondering if one you regular expression gurus out there could help me figure this out.

Thank you,
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