TYPO3 get protected property from DataHandler

Question

Im using a the hook

public function processDatamap_afterAllOperations(DataHandler &$pObj)
{

}

I want to read the protected mmHistoryRecords from the DataHandler Class. How can I do this in my class? My class already extends BackendUtility

Answer 1

You can use reflection to access protected properties or methods. That saves you from XCLASSing.

public function processDatamap_afterAllOperations(\TYPO3\CMS\Core\DataHandling\DataHandler $pObj)
{
    try {
        $prop = new \ReflectionProperty(
            \TYPO3\CMS\Core\DataHandling\DataHandler::class, 
            'mmHistoryRecords'
        );
        $prop->setAccessible(true);

        $mmHistoryRecords = $prop->getValue($pObj);
    } catch (\ReflectionException $e) {

    }
}

You can use it on methods and properties. So in PHP nothing is ever "private"... You need to judge yourself if you should do it, but it's always a possiblity.