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From: PerlFAQ Server on 10 May 2010 06:00
This is an excerpt from the latest version perlfaq7.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .

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7.12: How can I tell if a variable is tainted?

You can use the tainted() function of the Scalar::Util module, available
from CPAN (or included with Perl since release 5.8.0). See also
"Laundering and Detecting Tainted Data" in perlsec.



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are not necessarily experts in every domain where Perl might show up,
so please include as much information as possible and relevant in any
corrections. The perlfaq-workers also don't have access to every
operating system or platform, so please include relevant details for
corrections to examples that do not work on particular platforms.
Working code is greatly appreciated.

If you'd like to help maintain the perlfaq, see the details in
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