How to create captcha codes in PHP, NET, ASP with a captcha script
A capcha script is a small part of code that you put on your web forms in order to generate captcha codes.
As you probably know, captcha codes are a popular way to detect and stop spam bots, as they can not distinguish letters and numbers in an image if they are displayed in a noised way.
Captcha scripts an be written in many languages, including PHP, ASP, PERL. There are easy to break captchas and difficult to break captchas, it all depends on how the numbers and letters are displayed on the image. The more variation is added, the better ( ex. changing fonts randomly, overlapping letters and numbers, rotating each letter and number a bit to the left or to the right ) as this makes the captcha code more difficult to break.
Captcha Creator is an easy to use and higly customizable captcha script, that you can download and install in three easy steps. The online Captcha Customization Tool allows you to select what letters and numbers should be used, the face, size and color of the font, backrgound image, noise, and more. |
