Examples

Debugging and development setup

Very verbose configuration which logs and displays all errors and exceptions.

In LocalConfiguration.php:

'SYS' => array(
   'displayErrors' => '1',
   'devIPmask' => '*',
   'errorHandler' => 'TYPO3\\CMS\\Core\\Error\\ErrorHandler',
   'errorHandlerErrors' => E_ALL ^ E_NOTICE,
   'exceptionalErrors' => E_ALL ^ E_NOTICE ^ E_WARNING ^ E_USER_ERROR ^ E_USER_NOTICE ^ E_USER_WARNING,
   'debugExceptionHandler' => 'TYPO3\\CMS\\Core\\Error\\DebugExceptionHandler',
   'productionExceptionHandler' => 'TYPO3\\CMS\\Core\\Error\\DebugExceptionHandler',
   'systemLogLevel' => '0',
   'systemLog' => true,
),

In .htaccess:

php_flag display_errors on
php_flag log_errors on
php_value error_log /path/to/php_error.log

Production setup

Example for a production configuration which displays only errors and exceptions if the devIPmask matches. Errors and exceptions are only logged if their level is at least 2 (=Warning).

In LocalConfiguration.php:

'SYS' => array(
   'displayErrors' => '2',
   'devIPmask' => '[your.IP.address]',
   'errorHandler' => 'TYPO3\\CMS\\Core\\Error\\ErrorHandler',
   'systemLogLevel' => '2',
   'systemLog' => true,
   'syslogErrorReporting' => E_ALL ^ E_NOTICE ^ E_WARNING,
   'belogErrorReporting' => '0',
),

In .htaccess:

php_flag display_errors off
php_flag log_errors on
php_value error_log /path/to/php_error.log

Performance setup

Since the error and exception handling and also the logging need some performance, here's an example how to disable error and exception handling completely.

In LocalConfiguration.php:

'SYS' => array(
   'displayErrors' => '0',
   'devIPmask' => '',
   'errorHandler' => '',
   'debugExceptionHandler' => '',
   'productionExceptionHandler' => '',
   'systemLog' => false,
   'syslogErrorReporting' => '0',
   'belogErrorReporting' => '0',
),

In .htaccess:

php_flag display_errors off
php_flag log_errors off