I have a question about that regex. A look at sub unescape in CGI reveals a regex that's nearly identical to the one in question. The first difference is trivial {2}. I'm curious about how significant the use of a signed pack (c) in the CGI regex is, in contrast to the unsigned pack (C) in the other one? 
$value    =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg; # carg
+o

$todecode =~ s/%([0-9a-fA-F]{2})/pack("c",hex($1))/ge;          # CGI

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For reference's sake here's sub unescape from CGI.pm version 2.46: 
# unescape URL-encoded data
sub unescape {
    shift() if ref($_[0]);
    my $todecode = shift;
    return undef unless defined($todecode);
    $todecode =~ tr/+/ /;       # pluses become spaces
    $todecode =~ s/%([0-9a-fA-F]{2})/pack("c",hex($1))/ge;
    return $todecode;
}

[download]
thanks - epoptai

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In reply to Re: Re: PayPal Advice Sought by epoptai
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