3.7 Exceptions and Error Handling

Description

TYPO3 CD 2020 (zweite Auflage) Quiz on 3.7 Exceptions and Error Handling, created by Pascal Bartl on 09/04/2021.
Pascal Bartl
Quiz by Pascal Bartl, updated more than 1 year ago
Pascal Bartl
Created by Pascal Bartl over 3 years ago
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Resource summary

Question 1

Question
Which error and exception handlers exist in TYPO3 by default? (2)
Answer
  • Class \TYPO3\CMS\Core\Error\ErrorHandler as the default error handler
  • Class \TYPO3\CMS\Core\Error\SysLogHandler for writing errors to the system log
  • Class \TYPO3\CMS\Core\Error\WarningHandler for generating warnings
  • Class \TYPO3\CMS\Core\Error\ProductionExceptionHandler for the production context

Question 2

Question
You want to output errors generated by the default error handler as Flash Messages in the backend. What do you need to do? (1)
Answer
  • Make sure the debugExceptionHandler is set to \TYPO3\CMS\Core\Error\DebugExceptionHandler
  • Make sure Flash Messages are enabled in the Install Tool
  • Make sure errors are generated with the flag flashOutput set to true
  • Errors can not be displayed as Flash Messages by default – they are written to the system log for security reasons

Question 3

Question
Which statements about error logging in extensions are correct? (1)
Answer
  • Warnings and errors should be directly written to the sys_log table using the Query Builder
  • An instance of the Logger API is available in Extbase, if the system extension EXT:sys_logger is activated
  • Extension developers should use the TYPO3 core class DevLogging for debugging purposes during development
  • If an extension throws an exception, this will be logged using the configured error handler
  • Extensions should never throw exceptions but always output Flash Messages
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