/**
* Check if a Template Variable Exists
*
* @note The PRESENCE of key is tested, not its value
*
* @param string $tplVar
* Template Variable to be tested
*
* @return boolean
* TRUE if desired Template Variable exists and FALSE otherwise
*
* @throws Next\View\ViewException
* Testing existence of internal properties
*/
public function __isset($tplVar)
{
if (substr($tplVar, 0, 1) == '_' && $tplVar != self::CONTROLLER_EXCEPTION) {
throw ViewException::unnecessaryTest();
}
return array_key_exists($tplVar, $this->_tplVars);
}
