rfc:stackable_error_handler

PHP RFC: Stackable Error Handlers

Introduction

This RFC tries to address the couple of feedback and possible shortcomings of the current error handler infrastructure, via introducing a stackable error handler infrastructure(similar to the current spl_autoload one), which can be used to extend or replace the default error handler using a stackable API where multiple error handlers can co-exist and only care about their own errors.

Proposal

There would be a built-in error handler set, which implements the current behavior: - log the errors based on the config (error_reporting, log_error, error_log, etc.) - display the errors based on the config. - provides the $php_errormsg based on the config - this handler is defined for E_ALL

When you call set_error_handler using the old signature the the error handler will replace/shadow any other error handler set via the old signature and they will always come after the built-in handler but before any handler added with the new stackable signature. For example: 1. built-in E_ALL

set_error_handler(function($errno, $errstr, $errfile, $errline, $errcontext){/* do something here */}, E_WARNING) 1. built-in E_ALL 2. old-style E_WARNING

set_error_handler(function($errno, $errstr, $errfile, $errline, $errcontext){/* do something else here */}, E_NOTICE) 1. built-in E_ALL 2. old-style #2 E_NOTICE

The new stackable error handling would only generate and pass the error to the chain of handlers if there is at least one error handler set for that particular error type.

Backward Incompatible Changes

What breaks, and what is the justification for it?

Proposed PHP Version(s)

PHP 5.6 (or next major, if we happen to release a major version after 5.5).

SAPIs Impacted

TODO

New Constants

TODO

php.ini Defaults

TODO

Open Issues

TODO

Unaffected PHP Functionality

TODO

Future Scope

TODO

Proposed Voting Choices

TODO

Patches and Tests

TODO

References

TODO

Rejected Features

TODO

rfc/stackable_error_handler.txt · Last modified: 2013/04/18 08:23 by tyrael