PHP Warning: Declaration of ... should be compatible with ...

[marcosalberto]

Is there anyone with this problem?

1: PHP Warning: Declaration of FluidTYPO3\Fluidcontent\Hooks\WizardItemsHookSubscriber::applyWhitelist(array $items, array $whitelist) should be compatible with FluidTYPO3\Flux\Hooks\WizardItemsHookSubscriber::applyWhitelist(array $items, $whitelist) in /var/www/html/seven.local/siteroot/typo3conf/ext/fluidcontent/Classes/Hooks/WizardItemsHookSubscriber.php line 22 (More information)

My environment:
PHP 7.0.4
TYPO3 7.6.4

[NamelessCoder]

Hi @marcosalberto - make sure if you update PHP to 7.0.0 you pick a version of Flux (and all other FluidTYPO3 extensions) which are declared compatible with PHP 7.0.0. At the time of writing this, that means current TER versions of fluidpages and fluidcontent, plus development branch of Flux. Anything else is not compatible with PHP 7.0.0 and above. Updating just one but not the others may cause unresolvable constraints or signature issues.

Note that extension manager may not warn about constraint problems, possibly also constraints on PHP versions, there are known issues with constraints not being applied correctly. If in doubt, check the ext_emconf.php file of the extension you've got installed ;)