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I was going to answer something like that, but forgot all about it. In the meantime, I've read (once again) some parts of CGI.pm, and found these interesting regexes:

$toencode =~ s{&}{&amp;}gso; $toencode =~ s{<}{&lt;}gso; $toencode =~ s{>}{&gt;}gso; $toencode =~ s{"}{&quot;}gso; ... $toencode =~ s{'}{&#39;}gso; $toencode =~ s{\x8b}{&#139;}gso; $toencode =~ s{\x9b}{&#155;}gso; ... $toencode =~ s{\012}{&#10;}gso; $toencode =~ s{\015}{&#13;}gso;

That's at least 9 uses of /o with no variable interpolation in the pattern.

But CGI also doesn't use strict, has no spaces after commas, uses C-style for-loops where lists where more efficient and better readable, assumes that the IP address "0" equals "127.0.0.1", has ugly #-laden comments, etc... So is the use of /o really more efficient when no variable interpolation is used, or is this yet another strange thing in CGI.pm. (Excuse me for being so negative about CGI.pm, but having read it, I prefer my own set of functions even more.)

44696420796F7520732F2F2F65206F
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6D6521203A29202D2D204A75657264


In reply to Re: Re: Re: •Re: Find illegal ASCII characters by Juerd
in thread Find illegal ASCII characters by fmogavero

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