Telegram Bot API PHP SDK to build Telegram Bots
CrawlerDetect is a PHP class for detecting bots/crawlers/spiders
Preventing spam submitted through forms
The Telegram bot framework that doesn't drive you nuts
Browser sniffing gone too far — A useragent parser library for PHP
Human verification & attack prevention for website security
A framework agnostic PHP library to build chat bots
Protecting against spam, death by captcha and monetise your website.