Comments on: Create A Simple Captcha With PHP and GD http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html From Cody Taylor. Thu, 13 Oct 2011 06:41:44 -0700 http://wordpress.org/?v=2.8.4 hourly 1 By: Sandeep http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-5088 Sandeep Wed, 02 Mar 2011 07:17:01 +0000 http://codytaylor.org/?p=14213#comment-5088 Hi, I am very new to development. I tried the above good stuff and get success in creating the captcha image but did not go further as how to validate the printed letters on image after submitting the form. Thanks, please reply. Hi,
I am very new to development. I tried the above good stuff and get success in creating the captcha image but did not go further as how to validate the printed letters on image after submitting the form.

Thanks, please reply.

]]> By: Andreas Eriksson http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-4218 Andreas Eriksson Sat, 22 Aug 2009 10:54:16 +0000 http://codytaylor.org/?p=14213#comment-4218 Nice tutorial. I would rather use a custom captcha than use, for example, reCaptcha. Nice tutorial. I would rather use a custom captcha than use, for example, reCaptcha.

]]> By: Cody Taylor http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-4185 Cody Taylor Mon, 17 Aug 2009 19:27:29 +0000 http://codytaylor.org/?p=14213#comment-4185 Whoops...Not sure how that got by. Thanks for pointing that out. It has now been corrected. Whoops…Not sure how that got by. Thanks for pointing that out. It has now been corrected.

]]> By: Austin http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-4163 Austin Thu, 13 Aug 2009 22:51:42 +0000 http://codytaylor.org/?p=14213#comment-4163 I might be going crazy, but you have: function gen_random_string($length) { ... } and then $_SESSION['image_text']=genRandomString(8); Your function names don't match up. I might be going crazy, but you have:

function gen_random_string($length)
{
…
}

and then

$_SESSION['image_text']=genRandomString(8);

Your function names don’t match up.

]]> By: Cody Taylor http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-4148 Cody Taylor Wed, 12 Aug 2009 12:57:12 +0000 http://codytaylor.org/?p=14213#comment-4148 Thanks for the reply. reCaptcha is a neat project. I wonder what books they're scanning? I also say in the post not to use this for production without tweaking the captcha image quite a bit and I also give some tips on what to change. Thanks for the reply. reCaptcha is a neat project. I wonder what books they’re scanning? I also say in the post not to use this for production without tweaking the captcha image quite a bit and I also give some tips on what to change.

]]> By: Cody Taylor http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-4147 Cody Taylor Wed, 12 Aug 2009 12:51:27 +0000 http://codytaylor.org/?p=14213#comment-4147 Definitely a good tip. Definitely a good tip.

]]> By: وبلاگ من و متعه ام http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-4146 وبلاگ من و متعه ام Wed, 12 Aug 2009 07:30:05 +0000 http://codytaylor.org/?p=14213#comment-4146 nice and simple tutorial :) thanks. suggestion: you can replace "bg1.png" with "bg.php" and generate random background for more seurity. nice and simple tutorial :)
thanks.

suggestion: you can replace “bg1.png” with “bg.php” and generate random background for more seurity.

]]> By: David http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-4145 David Wed, 12 Aug 2009 04:39:33 +0000 http://codytaylor.org/?p=14213#comment-4145 This is not a very practical Captcha. It would be relatively easy to break since it uses a single font and does not make any effort to distort the letters. reCaptcha is a great project that presents very challenging, yet readable captchas, and in the background users are helping to digitize old books. Check it out: http://recaptcha.net/ This is not a very practical Captcha. It would be relatively easy to break since it uses a single font and does not make any effort to distort the letters. reCaptcha is a great project that presents very challenging, yet readable captchas, and in the background users are helping to digitize old books. Check it out: http://recaptcha.net/

]]> By: Cody Taylor http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-4144 Cody Taylor Wed, 12 Aug 2009 03:25:53 +0000 http://codytaylor.org/?p=14213#comment-4144 Thanks for the tip. I'll update the post accordingly. Thanks for the tip. I’ll update the post accordingly.

]]> By: Steve http://codytaylor.org/2009/08/create-a-simple-captcha-with-php-and-gd.html/comment-page-1#comment-4143 Steve Wed, 12 Aug 2009 03:22:27 +0000 http://codytaylor.org/?p=14213#comment-4143 Nice tutorial! That's a nice looking CAPTCHA. Though, there's no need to seed with mt_rand since PHP 4.2 since it does it for you. So you can simplify the script by removing that. Nice tutorial! That’s a nice looking CAPTCHA. Though, there’s no need to seed with mt_rand since PHP 4.2 since it does it for you. So you can simplify the script by removing that.

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