How to extend the error and exception handling

If you want to register your own error or exception handler:

1. Create a corresponding class in your extension

2. Override the Core defaults for productionExceptionHandler, debugExceptionHandler or errorHandler in typo3conf/AdditionalConfiguration.php:

   typo3conf/AdditionalConfiguration.php

   $GLOBALS['TYPO3_CONF_VARS']['SYS']['errorHandler'] = \Vendor\Ext\Error\MyOwnErrorHandler::class;
   $GLOBALS['TYPO3_CONF_VARS']['SYS']['debugExceptionHandler'] = \Vendor\Ext\Error\MyOwnDebugExceptionHandler::class;
   $GLOBALS['TYPO3_CONF_VARS']['SYS']['productionExceptionHandler'] = \Vendor\Ext\Error\MyOwnProductionExceptionHandler::class;

   Copied!

An error or exception handler class must register an error (exception) handler in its constructor. Have a look at the files in EXT:core/Classes/Error/ to see how this should be done.

If you want to use the built-in error and exception handling but extend it with your own functionality, derive your class from the error and exception handling classes shipped with TYPO3.

namespace Vendor\SomeExtension\Error;

class PostExceptionsOnTwitter extends \TYPO3\CMS\Core\Error\DebugExceptionHandler
{
    public function echoExceptionWeb(Exception $exception)
    {
        $this->postExceptionsOnTwitter($exception);
    }

    public function postExceptionsOnTwitter($exception)
    {
        // do it ;-)
    }
}

$GLOBALS['TYPO3_CONF_VARS']['SYS']['debugExceptionHandler'] = \Vendor\SomeExtension\Error\PostExceptionsOnTwitter::class;