TYPO3 Core

1st brainstorming stuff:

t3lib_utility_HookDispatcher::executeFunction($name, $this, $params)

    // Call hook when a page is retrieved from cache:
if (is_array($this->TYPO3_CONF_VARS['SC_OPTIONS']['tslib/class.tslib_fe.php']['pageLoadedFromCache']))    {
    $_params = array('pObj' => &$this, 'cache_pages_row' => &$row);
    foreach($this->TYPO3_CONF_VARS['SC_OPTIONS']['tslib/class.tslib_fe.php']['pageLoadedFromCache'] as $_funcRef)    {
        t3lib_div::callUserFunction($_funcRef,$_params,$this);
    }
}

// possibility to use closures here 

t3lib_utility_HookDispatcher::executeInterface($name, $this, $interface, $param1, $param2,$..., $timestamp)

if (is_array($TYPO3_CONF_VARS['SC_OPTIONS']['tslib/class.tslib_content.php']['getData'])) {
    foreach ($TYPO3_CONF_VARS['SC_OPTIONS']['tslib/class.tslib_content.php']['getData'] as $classData) {
        $hookObject = t3lib_div::getUserObj($classData);

        if (!($hookObject instanceof tslib_content_getDataHook)) {
            throw new UnexpectedValueException('$hookObject must implement interface tslib_content_getDataHook', 1195044480);
        }

        $retVal = $hookObject->getDataExtension($string, $fieldArray, $secVal, $retVal, $this);
    }
}

t3lib_utility_HookDispatcher::executeObject($name, $this, $method, $param1, $param2,$...)

if (is_array($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_tcemain.php']['processDatamapClass'])) {
foreach ($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_tcemain.php']['processDatamapClass'] as $classRef) {
    $hookObjectsArr[] = t3lib_div::getUserObj($classRef);
}
}
foreach ($hookObjectsArr as $hookObj) {
    if (method_exists($hookObj, 'processDatamap_afterDatabaseOperations')) {
        $hookObj->processDatamap_afterDatabaseOperations($status, $table, $id, $fieldArray, $this);
    }
}