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
• Remove BaseException
• Let EngineException and ParseException implement the Throwable interface

Throwable is no longer available as a name in the global namespace.

PHP 7

* Exceptions in the engine