want to join us? register, it's easy | help

browse by tag: captcha

sort by

newest, oldest, most popular


category icon

Creation of captcha / Part II /Secure forms

in PHP added by Jordan, on 12/5/2008 captcha secure

Display captcha using secure forms.

comment save report
category icon

Creating a CAPTCHA image with security code to validate forms

in PHP added by tutorialhelpdesk, on 5/3/2008 captcha form validation image security

In this tutorial you will learn to create a security code image generator, or a CAPTCHA image, that is so helpful against spammers.

comment save report
category icon

PHP Captcha Tutorial (in-depth)

in PHP added by techusky, on 2/1/2008 advanced tutorials captcha php5 security verification

This CAPTCHA script allows a user to easily customize things such as the string length, minimum and maximum font size, image size, the font used, and even the characters used, etc... Unlike most CAPTCHA scripts that generate the random text based on an md5 hash of the time, this one lets the user input specific numbers, uppercase, and lowercase characters they want used (or don't want used) in the creation of the CAPTCHA image. It also assures, regardless of the length of the string, that there is at least both 1 random upper and lowercase character in the string, thus making it more difficult for bots. Another feature in this script is that it randomly rotates each character on the image.

comment save report
category icon

GD Support Server Check with gd_info Function

in PHP added by ProgrammingPHP, on 2/8/2007 captcha image manipulation image verification media

Test your server's ability to use GD image manipulation through this script. If installed and supported, the GD library allows you to use CAPTCHA image verification and other forms of dynamic images.

comment save report
category icon

Basic image captcha

in PHP added by FiSh, on 11/6/2007 captcha gdlib image image verification security

Create a basic image captcha script for your forms.

comment save report
category icon

How to Create CAPTCHA Protection using PHP and AJAX

in PHP added by goodphptutorials, on 3/12/2006 AJAX advanced tutorials ajax captcha captcha

CAPTCHA is a simple test to determine if a user is a computer or a human. It is used to prevent spam abuse on the websites. The goal of this tutorial is to demonstrate how to make your own simple CAPTCHA protection using PHP and AJAX technologies.

comment save report
category icon

Visual Verification in PHP

in PHP added by goodphptutorials, on 8/4/2006 captcha security spam

Verification of form data is used to determine whether or not the submission is from a user or from a "bot". Most forms now include image verification for just this reason. This article will demonstrate how to create a simplified image verification system..

comment save report
category icon

PHP Security Image

in PHP added by goodphptutorials, on 3/4/2006 captcha image media security

This in depth tutorial will show you how to create a security image to prevent bots from flood-registering your site.

comment save report