Hotpatch is a library that can be used to dynamically load a shared library (.so) file on Linux from one process into another already running process without affecting the execution of the target process. The API is a C API, but also supported in C++. The user can load his/her own .so file into an already running process, invoke a custom symbol/function in that .so file, and pass arguments to that function as long as it is serialized to the form of a byte buffer and length of the buffer.
Ding is a PHP framework that provides dependency injection (by Setter, Constructor, and Method), Aspect Oriented Programming, XML, YAML, Events support, and some JSR 250/330 annotations as bean definition providers, lightweight, can be deployed as a PHAR file, simple, and quick MVC, syslog, TCP client and server with non-blocking sockets, timers, and custom error, signal, and exception handling, PAGI integration (for the Asterisk gateway interface), and PAMI integration (for Asterisk management). It is similar to Java's Seasar and Spring.