# Doctrine Inflector Doctrine Inflector is a small library that can perform string manipulations with regard to uppercase/lowercase and singular/plural forms of words. [](https://github.com/doctrine/inflector/actions?query=workflow%3A%22Continuous+Integration%22+branch%3A4.0.x) [](https://codecov.io/gh/doctrine/inflector/branch/2.0.x)
In case of an error, the API will return an error response containing a specific error code 400, 403 Failed and a user-friendly message. Refer to our API documentation for a comprehensive list of error codes and their descriptions.