PHP's Reflection implementation is unable to read certain information about core PHP classes. This library provides a mirrored implementation of core classes that can be used by Reflection to obtain metadata.

A practical example would be if you are attempting to inject a lazy-loaded proxy class of SoapClient to catch connection exceptions. Since proxying the core SoapClient class will not work, you can instead proxy CoreProxies\Proxy\SoapClient and successfully generate your implementation.