Making Captcha not case sensitive!

Emil

Well I've never seen a captcha system that WANTS to be all upper case so I figured a lot of my customers will have problems with it so I went to find out how to fix it...

it's actually pretty simple...

open class.captcha.php

on line 24 find:

$this->hash = strtoupper(substr(md5(rand(0, 9999)),rand(0, 24),$len));

replace it with:

$this->hash = strtolower(substr(md5(rand(0, 9999)),rand(0, 24),$len));

Save, re-upload and you're done!

Now all of the letters showing up in your Captcha will be lowercase!

I tested this working in IE, Chrome, and Firefox!

-Emil

Angelhn

this is a great idea!

typomaniac

Your solution for the most part is good as most people fill in captcha textboxes in lower case however the solution only changes the case of the generated captcha code. First time I've seen generated code on captcha. I notice that the code, when generated in uppercase is much easier to read. Maybe the best solution would be to change the statement which verifies the generated string to read it in a case insensitive manner.

For the time being however I do believe it would be good to inform users of the fact that the case sensitivity exist be it upper or lower which can easily be done by:

open the file include/client/open.inc.php

Find the text:(line 119) is a string

Enter the text shown on the image

Add something to the string in the way of (CASE SENSITIVE)

typomaniac

True Case Insensitivity

Hi, I to was perplexed with the sensitivity of the captcha codes and in the forum I found a way to make the code lower case (which most users use) but still needed to have a warning declaring that the captcha was case sensitive.

I contacted the OSTicket staff and they replied with:

To get captcha case insensitive - change code in open.php as follows;

strcmp($_SESSION,md5($_POST)

strcmp($_SESSION,md5(strtoupper($_POST))

btw...that is line 27 and when done should look like this

elseif (strcmp($_SESSION,md5(strtoupper($_POST))))

There was a post made on the subject and the code changes only made it to lower case and a change to class.captcha.php which was

$this->hash = strtoupper(substr(md5(rand(0, 9999)),rand(0, 24),$len));

change to:

$this->hash = strtolower(substr(md5(rand(0, 9999)),rand(0, 24),$len));

This needs to be "undone".

A big thanks to the staff at OS for their quick response and help on that one.

:) :) :) :)