Hooks¶

There's one hook defined in the Display Controller. It can be used to manipulate filters after their initialization. At this point a filter may either be empty or already have some structure read from the session cache.

The hook must be registered that way:

$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['displaycontroller']['extendInitFilter'][] = 'VendorName\\MyExtension\\Hooks\\DisplayController';

and a typical implementation might look like:

namespace VendorName\MyExtension\Hooks;
class DisplayController {

    /**
     * @param array $filter
     * @param \Tesseract\Displaycontroller\Controller\DisplayController $parentObject
     */
    public function extendInitFilter($filter, $parentObject) {
        // Do some changes to the filter
        return $filter;
    }
}

The method to implement is called extendInitFilter and it receives 2 arguments. The first one is the array containing the filter data and the second one is a reference to the Display Controller itself. The method must return the filter, even if no changes were made to it.