Attention

TYPO3 v9 has reached its end-of-life September 30th, 2021 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.

You can order Extended Long Term Support (ELTS) here: TYPO3 ELTS.

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:

   $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;
   

Tip

We use typo3conf/AdditionalConfiguration.php and not ext_localconf.php in the extension (as previously documented) because that will be executed after the error / exception handlers are initialized in the bootstrap process.

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.

Example Debug Exception Handler

This uses the default core exception handler DebugExceptionHandler and overrides some of the functionality:

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

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

typo3conf/AdditionalConfiguration.php:

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