PHP RFC: Introduce Throwable interface and Error class

• Version: 0.9
• Date: 2015-03-15
• Author: Sebastian Bergmann sebastian@php.net
• Status: Draft
• First Published at: http://wiki.php.net/rfc/throwable

PHP 7 replaces existing fatal or recoverable fatal errors with exceptions. While the respective RFC was already in voting, I proposed a change to the exception hierarchy it used (see below).

This RFC proposes the following changes to PHP 7's exception hierarchy:

* Introduce a Throwable interface * Let Exception implement the Throwable interface * Introduce an Error class that implements the Throwable interface * Use Error class as base class for exceptions raised by the engine

Error and Throwable are no longer available as names in the global namespace.

PHP 7

* Exceptions in the engine