FAQ 4.19 How do I validate input?


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This is an excerpt from the latest version perlfaq4.pod, which
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4.19: How do I validate input?

(contributed by brian d foy)

There are many ways to ensure that values are what you expect or want to
accept. Besides the specific examples that we cover in the perlfaq, you
can also look at the modules with "Assert" and "Validate" in their
names, along with other modules such as "Regexp::Common".

Some modules have validation for particular types of input, such as
"Business::ISBN", "Business::CreditCard", "Email::Valid", and


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