SQL Injection Cheat Sheet : Samples are provided to allow reader to get basic idea of a potential SQL Injection attack and almost every section includes a brief information about...
ServiceWorker Cookbook : The Service Worker Cookbook is a collection of working, practical examples of using service workers in modern web apps.
Inj3ct0r 1337day.com : Exploit database separated by exploit type (local, remote, DoS, Poc, etc.)
HTTP API design : This guide describes a set of HTTP+JSON API design practices, originally extracted from work on the Heroku Platform API.
This is a collection of known design patterns and some sample code how to implement them in PHP. Every pattern has a small list of examples (most of them from Zend Framework, Symfony2 or Doctrine2 as I'm most familiar with this software).