my $checker = new XML::Checker::Parser(Handlers => {});

foreach ($files) {
        print "Checking file $_ ...\n";
        eval    {
            $checker->parsefile($_);
        };
        if ($@) {
            (print $error)
        }
}

##</code><code>##

Checking file file1.xml ...
Checking file file2.xml ...
(115, ELEMENT [foo] already defined Element foo line 2 column 67 byte 90)
Checking file file3.xml ...
(115, ELEMENT [foo] already defined Element foo line 2 column 67 byte 90)
...