Simple usage

The most basic use is when you want an object that handles a given service type:

if (is_object($serviceObject = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstanceService('textLang'))) {
        $language = $serviceObject->guessLanguage($text);
}

In this example a service of type "textLang" is requested. If such a service is indeed available an object will be returned. Then the guessLanguage() - which would be part of the "textLang" service type public API - is called.

There's no certainty that an object will be returned, for a number of reasons:

  • there might be no service of the requested type installed

  • the service deactivated itself during registration because it recognized it can't run on your platform

  • the service was deactivated by the system because of certain checks

  • during initialization the service checked that it can't run and deactivated itself

Note that when a service is requested, the instance created is stored in a global registry. If that service is requested again during the same code run, the stored instance will be returned instead of a new one. More details in Service API.

If several services are available, the one with the highest priority (or quality if priority are equals) will be used.