Repository: symfony/symfony
File: src/Symfony/Component/VarDumper/VarDumper.php (PHP)

Code before:
        self::$handler = $callable;

        return $prevHandler;
    }

    private static function register(): void
    {
        $cloner = new VarCloner();
        $cloner->addCasters(ReflectionCaster::UNSET_CLOSURE_FILE_INFO);

        $format = $_SERVER['VAR_DUMPER_FORMAT'] ?? null;
        switch (true) {
            case 'html' === $format:
                $dumper = new HtmlDumper();
                break;
            case 'cli' === $format:
                $dumper = new CliDumper();
                break;
            case 'server' === $format:
            case $format && 'tcp' === parse_url($format, \PHP_URL_SCHEME):
                $host = 'server' === $format ? $_SERVER['VAR_DUMPER_SERVER'] ?? '127.0.0.1:9912' : $format;
                $dumper = self::guessMostSuitableDumper();
                $dumper = new ServerDumper($host, $dumper, self::getDefaultContextProviders());
                break;
            default:
                $dumper = self::guessMostSuitableDumper();
        }

        if (!$dumper instanceof ServerDumper) {
            $dumper = new ContextualizedDumper($dumper, [new SourceContextProvider()]);
        }

        self::$handler = function ($var, ?string $label = null) use ($cloner, $dumper) {
            $var = $cloner->cloneVar($var);

            if (null !== $label) {
                $var = $var->withContext(['label' => $label]);
            }

            $dumper->dump($var);
        };
    }

    private static function getDefaultContextProviders(): array
    {
        $contextProviders = [];

        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) && class_exists(Request::class)) {
            $requestStack = new RequestStack();
            $requestStack->push(Request::createFromGlobals());
            $contextProviders['request'] = new RequestContextProvider($requestStack);

Review comment (suggestion):
```suggestion
                $dumper = str_contains($_SERVER['HTTP_ACCEPT'] ?? 'html', 'html')  ? new HtmlDumper() : new CliDumper();
```

Code after:

        return $prevHandler;
    }

    private static function register(): void
    {
        $cloner = new VarCloner();
        $cloner->addCasters(ReflectionCaster::UNSET_CLOSURE_FILE_INFO);

        $format = $_SERVER['VAR_DUMPER_FORMAT'] ?? null;
        switch (true) {
            case 'html' === $format:
                $dumper = new HtmlDumper();
                break;
            case 'cli' === $format:
                $dumper = new CliDumper();
                break;
            case 'server' === $format:
            case $format && 'tcp' === parse_url($format, \PHP_URL_SCHEME):
                $host = 'server' === $format ? $_SERVER['VAR_DUMPER_SERVER'] ?? '127.0.0.1:9912' : $format;
                $dumper = str_contains($_SERVER['HTTP_ACCEPT'] ?? (\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'txt' : 'html'), 'html') ? new HtmlDumper() : new CliDumper();
                $dumper = new ServerDumper($host, $dumper, self::getDefaultContextProviders());
                break;
            default:
                $dumper = str_contains($_SERVER['HTTP_ACCEPT'] ?? (\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'txt' : 'html'), 'html') ? new HtmlDumper() : new CliDumper();
        }

        if (!$dumper instanceof ServerDumper) {
            $dumper = new ContextualizedDumper($dumper, [new SourceContextProvider()]);
        }

        self::$handler = function ($var, ?string $label = null) use ($cloner, $dumper) {
            $var = $cloner->cloneVar($var);

            if (null !== $label) {
                $var = $var->withContext(['label' => $label]);
            }

            $dumper->dump($var);
        };
    }

    private static function getDefaultContextProviders(): array
    {
        $contextProviders = [];

        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) && class_exists(Request::class)) {
            $requestStack = new RequestStack();
            $requestStack->push(Request::createFromGlobals());
            $contextProviders['request'] = new RequestContextProvider($requestStack);
        }