PHP_Compat

Table of Contents
Introduction -- Purpose and simple usage example
Components -- List of replicated components
Advanced usage -- Describe techniques for advanced usage
PHP_Compat::loadFunction() -- Load a function, or an array of functions
PHP_Compat::loadConstant() -- Load a constant, or an array of constants
PHP_Compat::loadVersion() -- Load all components, or all components until a given version of PHP

Provides missing functionality for older versions of PHP.