Perl, /unpack("C", hex...

Is that right?

[mdharrold]

We all use the following, but what would be the opposite of:
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;

Is there an unpack command that would work?

[DrDoc]

[perldoc.com...]

.. but, I guess that's not quite what you're looking for. You want a function that will take any character and return the HEX code, right?

[Key_Master]

You might find this script useful.

[webmasterworld.com...]

[Key_Master]

$value =~ s/([^a-zA-Z0-9_\+\.])/"%" . unpack("H*",$1)/eg;