sub fileExtension {
        my $file = shift;
        my $pos = index($file,".");
        if ($pos == "0") {
            return undef;
        } else {
                my $ext = lc(substr($file,$pos));
                return $ext;
        }
}
my $filename = 'test.test.txt';
print fileExtension($filename);

[download]
prints ".test.txt". So I don't think I'd recommend that one...

($_='kkvvttuu bbooppuuiiffss qqffssmm iibbddllffss')
=~y~b-v~a-z~s; print

In reply to Re: Rewrite a PHP fileExtension function by Cody Pendant
in thread Rewrite a PHP fileExtension function by ghenry

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