TYPO3 Core

* Checks whether the extension with extension key $key is installed.

*

* @param string $key key of the extension to test, must not be empty

* @param boolean $exceptionIfNotLoaded

* whether an exception should be thrown if the extension is not

* loaded

*

* @return boolean TRUE if the extension is loaded, FALSE otherwise

*/

public static function isInstalled($key, $exceptionIfNotLoaded = FALSE) {

$isInstalled = t3lib_div::inList(

$GLOBALS['TYPO3_CONF_VARS']['EXT']['extList'], $key

);

if (!$isInstalled && $exceptionIfNotLoaded) {

throw new BadFunctionCallException(

'TYPO3 Fatal Error: Extension "' . $key . '" was not installed!',

1272625953

);

}

return $isInstalled;

}

/**