php captcha知識摘要

How to Create CAPTCHA Protection using PHP and AJAX
//Initiate the AJAX request function makeRequest(url, param) {//If our readystate is either not started or finished, initiate a new request if (receiveReq.readyState == 4 || receiveReq.readyState == 0) { //Set up the connection to captcha_test.html. True

Securimage PHP Captcha | Free Captcha Script
A free open-source PHP CAPTCHA script for generating complex CAPTCHA images and audio files. Easy to integrate and customize.

Securimage PHP Captcha | Download
Upload this php script to your server and it will test your ability to run Securimage. .... great captcha coding! i've been using this library in the development of ...

Securimage PHP Captcha | Demo
Reload Image Enter Code*: Example using a mathematical CAPTCHA. ... Example using a two-word CAPTCHA. CAPTCHA Image Reload Image Enter Code*: ...

Securimage PHP Captcha | Quickstart Guide
Securimage requires no configuration after downloading. All you need to do is display the captcha image somewhere in your form, and validate the code ...

A Simple PHP CAPTCHA Script · A Beautiful Site
2011年1月16日 - This is one of the easiest CAPTCHA scripts you will ever use. While it doesn't obscure the text, it will serve its purpose well for many people ...

cool-php-captcha - Google Code
El objetivo de este proyecto es la generación de captchas de seguridad básica generando imágenes relativamente amigables para el usuario.

claviska/simple-php-captcha · GitHub
2014年7月10日 - A simple PHP CAPTCHA script. Contribute to simple-php-captcha development by creating an account on GitHub.

Example » A simple PHP CAPTCHA script
CAPTCHA Example. Usage. The following code will prepare a CAPTCHA image and keep the code in a session variable for later use:

PHP simple captcha script | Web Tools
2013年3月12日 - A CAPTCHA is a type of challenge-response test used in website as an attempt to ensure that the response is generated by a human being.