private function _checkEncapsedVariablesInsideString() {
		if ($this->_isActive('encapsedVariablesInsideString') && (!$this->statementStack->getCurrentStackItem()->inHeredoc || ($this->_inFuncCall && !$this->_config->isException('encapsedVariablesInsideString', end($this->_currentFuncCall))))) {
			$this->_writeError('encapsedVariablesInsideString', $this->_getMessage('VARIABLE_INSIDE_STRING'));
		}
	}