Comments on: Creating an Advanced PHP Captcha

By: amit

amit — Tue, 29 Jun 2010 11:34:58 +0000

hello i m amit
can anyone tell me we can create multiple captcha image on same page?

plz reply me…

thanks in advance

By: Rud

Rud — Mon, 31 May 2010 08:44:08 +0000

It’s very helpful.

thanks

By: Himansu

Himansu — Wed, 19 May 2010 11:52:30 +0000

I am using captcha in my form. But I want that if i don’t like to write like rather than i want to write like then how can i write that.

img.php —->File which converts image to captcha image

Please help me!
Thanks

By: web development company

web development company — Thu, 04 Feb 2010 05:01:11 +0000

Seems to be a good content here. . . Yes, Captchas are images that are used to tell the difference between a person and computer but i don’t know how to create i using PHP. now i will try to use it in my web pages.

By: Brenda

Brenda — Fri, 14 Aug 2009 19:50:38 +0000

Hi, love the script, as it is one I can actually use on html pages without having to use a bunch of code I can’t even figure out. However, try as I may, I flat can’t get it to move past the initial check onto the rest of my processing script. You don’t actually have an example of if true/false. Also, wouldn’t you need to also include a “require once” statement so your end processing form knows how-where to check your secret key? Sorry, I get a headache just thinking about scripts, much less understand all the code.

Any help is most appreciated,
Brenda

By: Alok Mishra

Alok Mishra — Tue, 05 May 2009 08:17:15 +0000

While implementing the captcha i found the following error from server after submission of the form :

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /home/sitar/public_html/SendQuerys.php:2) in /home/sitar/public_html/SendQuerys.php on line 3
You entered the wrong captcha image details.

By: Burt

Burt — Mon, 27 Apr 2009 11:47:35 +0000

How do I implement the validation code into the page?
Thanks for a great script!

By: Elliott Brueggeman

Elliott Brueggeman — Thu, 11 Dec 2008 06:10:07 +0000

The form being submitted is expected – the captcha does not prevent this from happening. What you need to do is validate the captcha by performing the hash comparison as shown in code box two. For background on why hashes work, try searching Wikipedia for “md5″ which is PHP’s best hashing alogrithm.

By: Michael

Michael — Thu, 11 Dec 2008 04:43:50 +0000

I’m trying to use your script. Everything works fine but it submits the form whether the code is correctly input or even if it is left empty. Once the submit button is pressed, the user is redirected to formresults.php page where I added the “checking the result code to” at the top but apparently I’m doing something wrong. Any help would be greatly appreciated.

Pages are:

http://www.soundwaveslakeland.com/captcha.html (form)
http://www.soundwaveslakeland.com/captcha.php (captcha script)
http://www.soundwaveslakeland.com/ProcessForm.php (Form script)
http://www.soundwaveslakeland.com/formresults.php (thank you page and summary of submitted content.)

Tnanks, Michael