1. alphabetical characters check

if ($who !~ /[A-Za-z]/) ...  # thanks to eric256 to point out the prob
+lem
if ($who2 !~ /[A-Za-z]/) ... # in my regexp. I really meant to use a n
+egative
                             # regexp. If any character not alphabetic
+al. ^_^

[download]
2. email address validation

if ($email =~ /@/) ...

[download]
Ok, what I did was perhaps too simple here. You should really use the Mail::Address module to check/obtain the canonical form of the Email address properly.

3. credit card number should only contain 16 characters

if ($creditcard =~ /^\d{16}$/) ...

[download]
Assume no space in the credit card number. Otherwise a simple check to strip out the space. Thanks to hardburn to point out the credit card checking modules. I was a bit lazy because Audrey Fong only wanted to check if there were 16 digits.

In reply to Re: Audrey Fong by Roger
in thread Need help with regexes to validate user input by Anonymous Monk

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