HippoPHP\Hippo\Checks\Style\LowerBooleanCheck::checkFileInternal PHP Method

    protected function checkFileInternal(CheckContext $checkContext, Config $config)
    {
        $file = $checkContext->getFile();
        $tokens = $checkContext->getTokenList();
        try {
            do {
                // Jump us to the next token we want to check.
                $token = $tokens->seekToType(T_STRING)->current();
                $tokenContent = $token->getContent();
                $lowerContent = strtolower($tokenContent);
                if ($token->isNativeConstant()) {
                    if ($tokenContent !== $lowerContent) {
                        $this->addViolation($file, $token->getLine(), $token->getColumn(), sprintf('`%s` should be in lowercase.', $tokenContent), Violation::SEVERITY_INFO);
                    }
                }
            } while ($tokens->valid());
        } catch (\HippoPHP\Tokenizer\Exception\OutOfBoundsException $e) {
            // Ignore the exception, we're at the end of the file.
        }
    }