GitHub - captcha-com/laravel-captcha: BotDetect PHP CAPTCHA Generator integration for the Laravel framework.
PHP script to generate captcha image and how to use in a web form
How to Implement Custom Captcha in PHP - YouTube
Custom Captcha Generator in HTML CSS & JavaScript
Build Your Own CAPTCHA Script with PHP – PHPZAG.COM
GitHub - dangkyokhoang/php-captcha-generator: PHP Captcha Generator using libgd
Create a Custom CAPTCHA and Contact Form in PHP | Envato Tuts+
Captcha Code in PHP and jQuery | FormGet
PHP Captcha - Phppot
GitHub - tarunk04/Captcha_Generator: It is a simple PHP script to generate captcha for form validation. It can be integrated in any website for captcha generation.