?
Solved

Captcha on Mac

Posted on 2013-10-29
5
Medium Priority
?
621 Views
Last Modified: 2013-10-30
We have a website that uses "captcha" such that when the user completes a form, there is a 5 letter / number code that must be retyped.

All is done in php.

On Mac computers using Safari, the browser automatically uppercases the first letter of the response; since this DOES NOT produce a match, it fails. The customer does not realize what is happening.

Is there a way to either prevent that from happening or to force Captcha to upper case the first letter?

Note I have NO CONTROL over how users will have configured their browser.

The captcha modules is attached.

Thanks
CaptchaSecurityImages.php
0
Comment
Question by:Richard Korts
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 111

Expert Comment

by:Ray Paseur
ID: 39610196
Yes, this is easy to fix.  I have an article on CAPTCHA here with several examples.
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_9849-Making-CAPTCHA-Friendlier-with-PHP-Image-Manipulation.html

You probably don't want to be using a piece of free code from 2006, anyway!  That would be like driving a 2006 car -- it's warranty has expired!
0
 
LVL 111

Accepted Solution

by:
Ray Paseur earned 2000 total points
ID: 39610201
But if you decide you want to keep that old thing, change line 30 to this:

            return strtoupper($code);

And in whatever place you check the security code make a similar normalization with strtoupper().
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 39610397
Most captchas like the reCaptcha from Google are made to be case insensitive.
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 39610477
Safari on my MacBook Pro with OS X 10.6.8 does not do that, it does not capitalize the first letter.  Which version of OSX and Safari is doing that?
0
 

Author Comment

by:Richard Korts
ID: 39611474
DaveBaldwin

It doesn't do it on the iPad either.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
3 proven steps to speed up Magento powered sites. The article focus is on optimizing time to first byte (TTFB), full page caching and configuring server for optimal performance.
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …
Suggested Courses

801 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question