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PHP 8.4 deprecates implicitly nullable parameters of the form "Type $x = null". TYPO3's default ErrorHandler converts that deprecation into an exception, so every console command that loads TCA (cache:flush, extension:setup, …) fails when this extension is installed on TYPO3 v14.3 / PHP 8.4+. Switch the signature to explicit "?Type $x = null".
bmack
approved these changes
Apr 22, 2026
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Problem
On TYPO3 v14.3 / PHP 8.4+, every console command that loads TCA
(
cache:flush,extension:setup, …) fails with:PHP 8.4 deprecated implicitly nullable parameters of the form
Type $x = null. TYPO3's defaultErrorHandlerpromotes thatdeprecation into an exception via
exceptionalErrors, whichaborts the command.
Fix
Change the signature of
TcaHelper::buildFieldConfiguration()from
array $fieldConfigurationOverride = nullto?array $fieldConfigurationOverride = null.This is a no-op at the behavioural level — the method body
already handles a null override correctly
(
if (!empty($fieldConfigurationOverride)))./cc @bmack