Comments for lorz's blog

Comment on How to make your own CAPTCHA system by Lewis

Lewis — Sat, 13 Sep 2008 15:51:55 +0000

How would I make the form which would include the CAPTCHA verification, plus a login?

Comment on How to make your own CAPTCHA system by Todd

Todd — Wed, 03 Sep 2008 12:06:02 +0000

Here is a simpler version for those also having trouble getting the above to work.

it uses a shadow text to help block OCR bots. Perhaps not as fancy as the above but hey it works.

————————————–

session_start();

header(”Content-type: image/png”);
$yellow = imagecolorallocatealpha($image, 255, 255, 0, 75);
$captcha_characters = ‘ABCDEFGHJKLMNPRSTUVWXY3456789′;
$im = @imagecreate(230, 70)
or die(”Cannot Initialize new GD image stream”);
$background_color = imagecolorallocate($im, 0, 0, 0);
$text_color = imagecolorallocatealpha($im, 255, 255, 0, 0);

for($i = 0; $i

—————————–

again simply save as “captcha.php” or whatever you like .php then insert into your form and use the same test in your form handling page to test if the correct code was used..

—————————–

if ($_POST['{captcha_field}'] == $_SESSION[$captcha]) {
// code if OK
} else {
// code if WRONG
}

—————————–

Hope this helps those that had problems with the above, if you want to make it more difficult you can if you know what you are doing.

I couldn’t get the top script to work on my server so I did my own research using PHP.net and got my fonts from dafont.com.

Hope it works for you people….

Comment on How to make your own CAPTCHA system by Joe

Joe — Thu, 07 Aug 2008 14:53:55 +0000

A few things confused me, so I thought I would pass them on.

1. if you copy/paste this code, you have to replace almost all of single/double quotes, because the ones on this page won’t work. I just did a replace all.

2. to insert the image into your page use an image tag with the src set the captcha.php.

3. If you want to change the background color of the captcha image, just save the 1.png/2.png with that background color.

Good Luck!

Comment on How to make your own CAPTCHA system by naxeem

naxeem — Tue, 05 Aug 2008 13:19:48 +0000

where do you put this code?
if ($_POST['{captcha_field}'] == $_SESSION['captcha_session']): // OK else: // WRONG endif;

Comment on How to make your own CAPTCHA system by Maor hazan

Maor hazan — Tue, 05 Aug 2008 08:55:12 +0000

Thanks !!!

Comment on How to make your own CAPTCHA system by adi

adi — Sun, 03 Aug 2008 15:42:45 +0000

where do you put this code?
if ($_POST['{captcha_field}'] == $_SESSION['captcha_session']):
// OK
else:
// WRONG
endif;

Comment on Automatically resize images in PHP - Script tutorial by erypogysterway

erypogysterway — Sun, 03 Aug 2008 01:56:59 +0000

Thank you

Comment on How to make your own CAPTCHA system by amin3d

amin3d — Tue, 08 Jul 2008 20:21:48 +0000

great job! Is it possible to translate your tutorial to other language?

Comment on How to make your own CAPTCHA system by Flexsin

Flexsin — Mon, 07 Jul 2008 05:50:46 +0000

Many thanks!! I have used this script many times and it works. thanks a lot.

http://www.flexsin.com

Comment on New top-level domains from ICANN by Dale Hay

Dale Hay — Mon, 30 Jun 2008 20:03:41 +0000

Google might then own .google domains and Amazon with .amazon domains. I wouldn’t mind owning a .dale domain, that’d be great!

Also think of all those people who would be buying and selling “premium” extentions, it’s going to open up yet another new market.