Aren't you assuming a specific tool was used to do the zipping, though? Or, is that a universal standard?

Try this (requires the Archive::Zip module): 

use Archive::Zip;
$zip = Archive::Zip->new();
die "Invalid zip file!" if $zip->read("zipfile.zip") != AZ_OK;

[download]
Update:You may need some of the other Archive modules if you want to check for gzipped files.

In reply to Re: Re: testing for a zip file by ChrisS
in thread testing for a zip file by Anonymous Monk

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