AppserverIo\Appserver\ServletEngine\Security\Auth\Spi\UsernamePasswordLoginModule::validatePassword PHP Method

    protected function validatePassword(string $inputPassword, string $expectedPassword)
    {
        // if username or password is NULL, return immediately
        if ($inputPassword == null || $expectedPassword == null) {
            return false;
        }
        // initialize the valid login flag
        $valid = false;
        // query whether or not we've to ignore the case
        if ($this->ignorePasswordCase === true) {
            $valid = $inputPassword->equalsIgnoreCase($expectedPassword);
        } else {
            $valid = $inputPassword->equals($expectedPassword);
        }
        // return the flag
        return $valid;
    }