scalarNode example

    public function getKey(): string
    {
        return 'remote-user';
    }

    public function addConfiguration(NodeDefinition $node): void
    {
        $node
            ->children()
                ->scalarNode('provider')->end()
                ->scalarNode('user')->defaultValue('REMOTE_USER')->end()
            ->end()
        ;
    }
}

use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

class Configuration implements ConfigurationInterface
{
    public function getConfigTreeBuilder(): TreeBuilder
    {
        $treeBuilder = new TreeBuilder('default_config_test');

        $treeBuilder->getRootNode()
            ->children()
                ->scalarNode('foo')->defaultValue('%default_config_test_foo%')->end()
                ->scalarNode('baz')->defaultValue('%env(BAZ)%')->end()
            ->end();

        return $treeBuilder;
    }
}

    public function getConfigTreeBuilder(): TreeBuilder
    {
        $tb = new TreeBuilder('primitive_types');
        $rootNode = $tb->getRootNode();
        $rootNode
            ->children()
                ->booleanNode('boolean_node')->end()
                ->enumNode('enum_node')->values(['foo', 'bar', 'baz', TestEnum::Bar])->end()
                ->floatNode('float_node')->end()
                ->integerNode('integer_node')->end()
                ->scalarNode('scalar_node')->end()
                ->scalarNode('scalar_node_with_default')->defaultTrue()->end()
            ->end()
        ;

        return $tb;
    }
}

$listener->replaceArgument(3, new Reference($entryPointId));

        return [$provider, $listenerId, $entryPointId];
    }

    public function addConfiguration(NodeDefinition $node): void
    {
        parent::addConfiguration($node);

        $node
            ->children()
                ->scalarNode('service')->defaultValue('ldap')->end()
                ->scalarNode('dn_string')->defaultValue('{username}')->end()
                ->scalarNode('query_string')->end()
                ->scalarNode('search_dn')->defaultValue('')->end()
                ->scalarNode('search_password')->defaultValue('')->end()
            ->end()
        ;
    }
}

use Symfony\Component\Config\Definition\Configurator\DefinitionConfigurator;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
use Symfony\Component\HttpKernel\Bundle\AbstractBundle;

class AcmeFooBundle extends AbstractBundle
{
    public function configure(DefinitionConfigurator $definition): void
    {
        $definition->rootNode()
            ->children()
                ->scalarNode('foo')->defaultValue('bar')->end()
            ->end()
        ;

        $definition->import('Resources/config/definition.php');
    }

    public function prependExtension(ContainerConfigurator $container, ContainerBuilder $builder): void
    {
        $container->extension('loaded', ['bar' => 'baz']);
    }

    

        $treeBuilder = new TreeBuilder('elasticsearch');

        $debug = EnvironmentHelper::getVariable('APP_ENV', 'prod') !== 'prod';

        $rootNode = $treeBuilder->getRootNode();
        $rootNode
            ->children()
                ->booleanNode('enabled')->end()
                ->booleanNode('indexing_enabled')->end()
                ->integerNode('indexing_batch_size')->defaultValue(100)->end()
                ->scalarNode('hosts')->end()
                ->scalarNode('index_prefix')->end()
                ->scalarNode('throw_exception')->end()
                ->scalarNode('logger_level')->defaultValue($debug ? Level::Debug : Level::Error)->end()
                ->arrayNode('ssl')
                    ->children()
                        ->scalarNode('cert_path')->end()
                        ->scalarNode('cert_password')->end()
                        ->scalarNode('cert_key_path')->end()
                        ->scalarNode('cert_key_password')->end()
                        ->booleanNode('verify_server_cert')->defaultValue(true)->end()
                    ->end()
                

$this->addToAssertionCount(1);
    }
}

class FooConfiguration implements ConfigurationInterface
{
    public function getConfigTreeBuilder(): TreeBuilder
    {
        $treeBuilder = new TreeBuilder('foo');
        $treeBuilder->getRootNode()
            ->children()
                ->scalarNode('bar')->end()
                ->scalarNode('baz')->end()
                ->booleanNode('bool_node')->end()
            ->end();

        return $treeBuilder;
    }
}

class FooExtension extends Extension
{
    public function getAlias(): string
    {

<?php
use Symfony\Component\Config\Definition\Configurator\DefinitionConfigurator;

return static function DDefinitionConfigurator $definition) {
    $definition->rootNode()
        ->children()
            ->scalarNode('baz')->defaultValue('multi')->end()
        ->end()
    ;
};

class NodeInitialValues implements ConfigurationInterface
{
    public function getConfigTreeBuilder(): TreeBuilder
    {
        $tb = new TreeBuilder('node_initial_values');
        $rootNode = $tb->getRootNode();
        $rootNode
            ->children()
                ->arrayNode('some_clever_name')
                    ->children()
                        ->scalarNode('first')->end()
                        ->scalarNode('second')->end()
                        ->scalarNode('third')->end()
                    ->end()
                ->end()

                ->arrayNode('messenger')
                    ->children()
                        ->arrayNode('transports')
                            ->normalizeKeys(false)
                            ->useAttributeAsKey('name')
                            ->arrayPrototype()
                                

<?php
use Symfony\Component\Config\Definition\Configurator\DefinitionConfigurator;

return static function DDefinitionConfigurator $definition) {
    $definition->rootNode()
        ->children()
            ->scalarNode('foo')->defaultValue('one')->end()
        ->end()
    ;
};

public function getKey(): string
    {
        return 'oidc';
    }

    public function addConfiguration(NodeBuilder $node): void
    {
        $node
            ->arrayNode($this->getKey())
                ->fixXmlConfig($this->getKey())
                ->children()
                    ->scalarNode('claim')
                        ->info('Claim which contains the user identifier (e.g.: sub, email..).')
                        ->defaultValue('sub')
                    ->end()
                    ->scalarNode('audience')
                        ->info('Audience set in the token, for validation purpose.')
                        ->isRequired()
                    ->end()
                    ->arrayNode('issuers')
                        ->info('Issuers allowed to generate the token, for validation purpose.')
                        ->isRequired()
                        ->prototype('scalar')->end()
                    

        $container->setDefinition($id, new ChildDefinition($config));
    }

    public function getKey(): string
    {
        return 'id';
    }

    public function addConfiguration(NodeBuilder $node): void
    {
        $node->scalarNode($this->getKey())->end();
    }
}

public function addConfiguration(NodeBuilder $node): void
    {
        $node
            ->arrayNode($this->getKey())
                ->fixXmlConfig($this->getKey())
                ->beforeNormalization()
                    ->ifString()
                    ->then(fn ($v) => ['claim' => 'sub', 'base_uri' => $v])
                ->end()
                ->children()
                    ->scalarNode('base_uri')
                        ->info('Base URI of the userinfo endpoint on the OIDC server.')
                        ->isRequired()
                        ->cannotBeEmpty()
                    ->end()
                    ->scalarNode('claim')
                        ->info('Claim which contains the user identifier (e.g. sub, email, etc.).')
                        ->defaultValue('sub')
                        ->cannotBeEmpty()
                    ->end()
                    ->scalarNode('client')
                        ->info('HttpClient service id to use to call the OIDC server.')
                    

class LoginLinkFactory extends AbstractFactory
{
    public const PRIORITY = -20;

    public function addConfiguration(NodeDefinition $node): void
    {
        /** @var NodeBuilder $builder */
        $builder = $node->fixXmlConfig('signature_property', 'signature_properties')->children();

        $builder
            ->scalarNode('check_route')
                ->isRequired()
                ->info('Route that will validate the login link - e.g. "app_login_link_verify".')
            ->end()
            ->scalarNode('check_post_only')
                ->defaultFalse()
                ->info('If true, only HTTP POST requests to "check_route" will be handled by the authenticator.')
            ->end()
            ->arrayNode('signature_properties')
                ->isRequired()
                ->prototype('scalar')->end()
                ->requiresAtLeastOneElement()
                

$this->options[$name] = $default;
    }

    /** * @return void */
    public function addConfiguration(NodeDefinition $node)
    {
        $builder = $node->children();

        $builder
            ->scalarNode('provider')->end()
            ->booleanNode('remember_me')->defaultTrue()->end()
            ->scalarNode('success_handler')->end()
            ->scalarNode('failure_handler')->end()
        ;

        foreach (array_merge($this->options, $this->defaultSuccessHandlerOptions, $this->defaultFailureHandlerOptions) as $name => $default) {
            if ('require_previous_session' === $name) {
                $builder
                    ->booleanNode($name)
                    ->setDeprecated('symfony/security-bundle', '6.4', 'Option "%node%" at "%path%" is deprecated, it will be removed in version 7.0. Setting it has no effect anymore.')
                    ->defaultValue($default);
            }