Sometimes, a CPAN dist will contain additional documentation in a POD file separate from the main module file. From the Archive::Zip::FAQ: How to test file integrity? 
Q: How can Archive::Zip can test the validity of a Zip file?

A:

There are two ready-to-use utilities in the examples directory that ca
+n be used to test
file integrity, or that you can use as examples for your own code:

examples/zipcheck.pl shows how to use an attempted extraction to test 
+a file.

[download]

The example script uses eval and: 

Archive::Zip::setErrorHandler( sub { warn shift() } );

[download]

When I run zipcheck.pl on a file which I know is not a zip file, I only get one message: 

format error: can't find EOCD signature

[download]

In reply to Re: Checking if a file is present in a ZIP archive by toolic
in thread Checking if a file is present in a ZIP archive by bontchev

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