Введение
The runkit extension provides means to modify constants,
user-defined functions, and user-defined classes.
It also provides for custom superglobal variables
and embeddable sub-interpreters via sandboxing.
This package is meant as a feature added replacement for the
» classkit package.
When compiled with the --enable-runkit=classkit
option to ./configure, it will export classkit compatible function definitions
and constants.