TYPO3 Cache Hook

DataHandlerCacheFlushingHook.php

<?php

declare(strict_types=1);

namespace Vendor\MyExtension\Hooks;

use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerAwareTrait;
use TYPO3\CMS\Core\DataHandling\DataHandler;

class DataHandlerCacheFlushingHook implements LoggerAwareInterface
{
    use LoggerAwareTrait;

    public function doSomething(array $parameters, DataHandler $dataHandler)
    {
        unset($parameters['TSConfig']); // remove this key because it's only flooding the logs!
        $this->logger->debug(print_r($parameters, true));
    }
}

ext_localconf.php

<?php

$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_tcemain.php']['clearCachePostProc']['my_extension'] = \Vendor\MyExtension\Hooks\DataHandlerCacheFlushingHook::class . '->doSomething';