On 2/16/06, Roger Thomas <[EMAIL PROTECTED]> wrote:
> I am currently testing HN CAPTCHA and noticed that the range of alphabets
> that were produced ranges from A..F only. My PHP skill is quite limited to
> change that to A..Z so if ppl here have any experience with that class,
> appreciate your thoughts. TIA.
The reason this CAPTCHA class only returns letters between A-F is
because it uses the md5() function in php to get a (more or less)
random string. MD5 hashes contains of a 32-character hexadecimal
numbers, which in turn ranges from 0 to F.
To solve your problem, replace the generate_private() function in
hn_captcha.class.php - starting at row 756 - with this code:
function generate_private($public="")
{
$letters = "1234567890abcdefghijklmnopqrstuvwxyz";
$maxsize = strlen($letters)-1;
for($i=0;$i<6;$i++){
$rstring .= $letters{mt_rand(0, $maxsize)};
}
return $rstring;
}
This should yield a 6 char "random" string containing digits 0-9 and
letters a-z.
Good luck!
--
Kim Christensen
[EMAIL PROTECTED]
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