As documented, use the second parameter on the addFile() method to force a different name, which (not documented) can include a name with no path. I leave it as an exercise for the reader to figure out how to determine the base filename without the path for any given file. Sample attached.

#!/usr/bin/perl

use Archive::Zip;

use strict;

my $TRUE        = 1;
my $FALSE        = 0;

foreach my $addtyp (qw /yespath nopath/)
{
    # Hard-code test values
    my $os_nam = $^O;                        # Operating system name
    my $unisep = '/';                        # *nix directory separato
+r
    my $winsep = "\\";                        # Windows directory sepa
+rator
    my $subdnm = "sub1";                    # Subdirectory name
    my $shtfnm = 'test.dat';                # Filename with no path
    my $zipfnm = "test-$addtyp.zip";        # ZIP filename
    my $zipobj = '';                        # ZIP object pointer
    my $newflg = $TRUE;                        # Was this a new ZIP fi
+le?
    
    # Set up test environment
    my $dirsep = $unisep;                    # Assum *nix until proven
+ otherwise
    if ($os_nam =~ /windows|win\d+/i)
    {
        # Appears to be Windows
        $dirsep = $winsep;
    }
    unlink $zipfnm;                            # Do not care if nonext
+ant
    mkdir $subdnm;                            # Do not care if extant
    my $addfnm = "$subdnm$dirsep$shtfnm";    # Filename with path to a
+dd
    open ADDFIL, ">$addfnm";
    print ADDFIL "This is a test.\n";
    close ADDFIL;
    
    # Perform test
    $zipobj = Archive::Zip->new();
    if ($addtyp =~ /yespath/)
    {
        my $addret = $zipobj->addFile($addfnm);
    }
    else
    {
        my $addret = $zipobj->addFile($addfnm, $shtfnm);
    }
    my $wriret = $zipobj->writeToFileNamed($zipfnm);
}

exit;
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