J'ai téléchargé la dernière version de symfony sur le site officiel : https://symfony.com/

tout s'est bien passé mais j'ai du mal à l'installer.Je précise qu'il s'agit d'une installation sans passer par composer.
J'ai créé un repertoire de mon projet et je suis sur windows 8.1 et Wampserver fonctionne correctement .Je précise que ma version de php est 5.5.12.
Je précise que j'ai installé le tout dans un répertoire qui porte le nom de symfony.
Seulement, quand je lance l'adresse : http://localhost/Symfony/web/config.php j'obtiens une page blanche avec le contenu ci-dessus :



Symfony
Search on Symfony website
Configuration Checker

This script analyzes your system to check whether is ready to run Symfony applications.
Recommendations

To enhance your Symfony experience, it’s recommended that you fix the following:

1 Set "xdebug.max_nesting_level" to e.g. "250" in php.ini* to stop Xdebug's infinite recursion protection erroneously throwing a fatal error in your project.
2 In most cases you should be fine, but please verify there is no inconsistencies between data provided by Symfony and the intl extension. See https://github.com/symfony/symfony/issues/15007 for an example of inconsistencies you might run into.
3 Install and/or enable a PHP accelerator (highly recommended).

* Changes to the php.ini file must be done in "C:\wamp\bin\apache\apache2.4.9\bin\php.ini".

Re-check configuration

Symfony Standard Edition

Je ne trouve pas le : xdebug.max_nesting_level, dans mon php.ini, comment faire?




et lorsque je lance cette adresse : http://localhost/symfony/web/app_dev.php/

j'obtiens :

Whoops, looks like something went wrong.

3/3 FileLoaderLoadException in FileLoader.php line 118: The file "C:\wamp\www\symfony\app/config\parameters.yml" does not contain valid YAML in C:\wamp\www\symfony\app/config\parameters.yml (which is being imported from "C:\wamp\www\symfony\app/config\config.yml").

in FileLoader.php line 118
at FileLoader->import('parameters.yml', null, false, 'C:\wamp\www\symfony\app/config\config.yml') in YamlFileLoader.php line 105
at YamlFileLoader->parseImports(array('imports' => array(array('resource' => 'parameters.yml'), array('resource' => 'security.yml'), array('resource' => 'services.yml')), 'parameters' => array('locale' => 'en'), 'framework' => array('secret' => '%secret%', 'router' => array('resource' => '%kernel.root_dir%/config/routing.yml', 'strict_requirements' => null), 'form' => null, 'csrf_protection' => null, 'validation' => array('enable_annotations' => true), 'templating' => array('engines' => array('twig')), 'default_locale' => '%locale%', 'trusted_hosts' => null, 'trusted_proxies' => null, 'session' => array('handler_id' => 'session.handler.native_file', 'save_path' => '%kernel.root_dir%/../var/sessions/%kernel.environment%'), 'fragments' => null, 'http_method_override' => true, 'assets' => null), 'twig' => array('debug' => '%kernel.debug%', 'strict_variables' => '%kernel.debug%'), 'doctrine' => array('dbal' => array('driver' => 'pdo_mysql', 'host' => '%database_host%', 'port' => '%database_port%', 'dbname' => '%database_name%', 'user' => '%database_user%', 'password' => '%database_password%', 'charset' => 'UTF8'), 'orm' => array('auto_generate_proxy_classes' => '%kernel.debug%', 'naming_strategy' => 'doctrine.orm.naming_strategy.underscore', 'auto_mapping' => true)), 'swiftmailer' => array('transport' => '%mailer_transport%', 'host' => '%mailer_host%', 'username' => '%mailer_user%', 'password' => '%mailer_password%', 'spool' => array('type' => 'memory'))), 'C:\wamp\www\symfony\app/config\config.yml') in YamlFileLoader.php line 54
at YamlFileLoader->load('C:\wamp\www\symfony\app/config\config.yml', null) in FileLoader.php line 103
at FileLoader->import('config.yml', null, false, 'C:\wamp\www\symfony\app/config/config_dev.yml') in YamlFileLoader.php line 105
at YamlFileLoader->parseImports(array('imports' => array(array('resource' => 'config.yml')), 'framework' => array('router' => array('resource' => '%kernel.root_dir%/config/routing_dev.yml', 'strict_requirements' => true), 'profiler' => array('only_exceptions' => false)), 'web_profiler' => array('toolbar' => true, 'intercept_redirects' => false), 'monolog' => array('handlers' => array('main' => array('type' => 'stream', 'path' => '%kernel.logs_dir%/%kernel.environment%.log', 'level' => 'debug', 'channels' => array('!event')), 'console' => array('type' => 'console', 'channels' => array('!event', '!doctrine'))))), 'C:\wamp\www\symfony\app/config/config_dev.yml') in YamlFileLoader.php line 54
at YamlFileLoader->load('C:\wamp\www\symfony\app/config/config_dev.yml', null) in DelegatingLoader.php line 45
at DelegatingLoader->load('C:\wamp\www\symfony\app/config/config_dev.yml') in AppKernel.php line 48
at AppKernel->registerContainerConfiguration(object(DelegatingLoader)) in Kernel.php line 563
at Kernel->buildContainer() in Kernel.php line 476
at Kernel->initializeContainer() in Kernel.php line 117
at Kernel->boot() in Kernel.php line 166
at Kernel->handle(object(Request)) in app_dev.php line 30

2/3 InvalidArgumentException in YamlFileLoader.php line 339: The file "C:\wamp\www\symfony\app/config\parameters.yml" does not contain valid YAML.

in YamlFileLoader.php line 339
at YamlFileLoader->loadFile('C:\wamp\www\symfony\app/config\parameters.yml') in YamlFileLoader.php line 44
at YamlFileLoader->load('C:\wamp\www\symfony\app/config\parameters.yml', null) in FileLoader.php line 103
at FileLoader->import('parameters.yml', null, false, 'C:\wamp\www\symfony\app/config\config.yml') in YamlFileLoader.php line 105
at YamlFileLoader->parseImports(array('imports' => array(array('resource' => 'parameters.yml'), array('resource' => 'security.yml'), array('resource' => 'services.yml')), 'parameters' => array('locale' => 'en'), 'framework' => array('secret' => '%secret%', 'router' => array('resource' => '%kernel.root_dir%/config/routing.yml', 'strict_requirements' => null), 'form' => null, 'csrf_protection' => null, 'validation' => array('enable_annotations' => true), 'templating' => array('engines' => array('twig')), 'default_locale' => '%locale%', 'trusted_hosts' => null, 'trusted_proxies' => null, 'session' => array('handler_id' => 'session.handler.native_file', 'save_path' => '%kernel.root_dir%/../var/sessions/%kernel.environment%'), 'fragments' => null, 'http_method_override' => true, 'assets' => null), 'twig' => array('debug' => '%kernel.debug%', 'strict_variables' => '%kernel.debug%'), 'doctrine' => array('dbal' => array('driver' => 'pdo_mysql', 'host' => '%database_host%', 'port' => '%database_port%', 'dbname' => '%database_name%', 'user' => '%database_user%', 'password' => '%database_password%', 'charset' => 'UTF8'), 'orm' => array('auto_generate_proxy_classes' => '%kernel.debug%', 'naming_strategy' => 'doctrine.orm.naming_strategy.underscore', 'auto_mapping' => true)), 'swiftmailer' => array('transport' => '%mailer_transport%', 'host' => '%mailer_host%', 'username' => '%mailer_user%', 'password' => '%mailer_password%', 'spool' => array('type' => 'memory'))), 'C:\wamp\www\symfony\app/config\config.yml') in YamlFileLoader.php line 54
at YamlFileLoader->load('C:\wamp\www\symfony\app/config\config.yml', null) in FileLoader.php line 103
at FileLoader->import('config.yml', null, false, 'C:\wamp\www\symfony\app/config/config_dev.yml') in YamlFileLoader.php line 105
at YamlFileLoader->parseImports(array('imports' => array(array('resource' => 'config.yml')), 'framework' => array('router' => array('resource' => '%kernel.root_dir%/config/routing_dev.yml', 'strict_requirements' => true), 'profiler' => array('only_exceptions' => false)), 'web_profiler' => array('toolbar' => true, 'intercept_redirects' => false), 'monolog' => array('handlers' => array('main' => array('type' => 'stream', 'path' => '%kernel.logs_dir%/%kernel.environment%.log', 'level' => 'debug', 'channels' => array('!event')), 'console' => array('type' => 'console', 'channels' => array('!event', '!doctrine'))))), 'C:\wamp\www\symfony\app/config/config_dev.yml') in YamlFileLoader.php line 54
at YamlFileLoader->load('C:\wamp\www\symfony\app/config/config_dev.yml', null) in DelegatingLoader.php line 45
at DelegatingLoader->load('C:\wamp\www\symfony\app/config/config_dev.yml') in AppKernel.php line 48
at AppKernel->registerContainerConfiguration(object(DelegatingLoader)) in Kernel.php line 563
at Kernel->buildContainer() in Kernel.php line 476
at Kernel->initializeContainer() in Kernel.php line 117
at Kernel->boot() in Kernel.php line 166
at Kernel->handle(object(Request)) in app_dev.php line 30

1/3 ParseException in Parser.php line 296: Unable to parse at line 5 (near " database_port: null").

in Parser.php line 296
at Parser->parse('# This file is auto-generated during the composer install parameters: database_host: 127.0.0.1 database_port: null database_name: symfony database_user: root database_password: null mailer_transport: smtp mailer_host: 127.0.0.1 mailer_user: null mailer_password: null secret: 9ab978bc87e8b93eb5b33581c8b7d1e2c0584dd2 ') in YamlFileLoader.php line 337
at YamlFileLoader->loadFile('C:\wamp\www\symfony\app/config\parameters.yml') in YamlFileLoader.php line 44
at YamlFileLoader->load('C:\wamp\www\symfony\app/config\parameters.yml', null) in FileLoader.php line 103
at FileLoader->import('parameters.yml', null, false, 'C:\wamp\www\symfony\app/config\config.yml') in YamlFileLoader.php line 105
at YamlFileLoader->parseImports(array('imports' => array(array('resource' => 'parameters.yml'), array('resource' => 'security.yml'), array('resource' => 'services.yml')), 'parameters' => array('locale' => 'en'), 'framework' => array('secret' => '%secret%', 'router' => array('resource' => '%kernel.root_dir%/config/routing.yml', 'strict_requirements' => null), 'form' => null, 'csrf_protection' => null, 'validation' => array('enable_annotations' => true), 'templating' => array('engines' => array('twig')), 'default_locale' => '%locale%', 'trusted_hosts' => null, 'trusted_proxies' => null, 'session' => array('handler_id' => 'session.handler.native_file', 'save_path' => '%kernel.root_dir%/../var/sessions/%kernel.environment%'), 'fragments' => null, 'http_method_override' => true, 'assets' => null), 'twig' => array('debug' => '%kernel.debug%', 'strict_variables' => '%kernel.debug%'), 'doctrine' => array('dbal' => array('driver' => 'pdo_mysql', 'host' => '%database_host%', 'port' => '%database_port%', 'dbname' => '%database_name%', 'user' => '%database_user%', 'password' => '%database_password%', 'charset' => 'UTF8'), 'orm' => array('auto_generate_proxy_classes' => '%kernel.debug%', 'naming_strategy' => 'doctrine.orm.naming_strategy.underscore', 'auto_mapping' => true)), 'swiftmailer' => array('transport' => '%mailer_transport%', 'host' => '%mailer_host%', 'username' => '%mailer_user%', 'password' => '%mailer_password%', 'spool' => array('type' => 'memory'))), 'C:\wamp\www\symfony\app/config\config.yml') in YamlFileLoader.php line 54
at YamlFileLoader->load('C:\wamp\www\symfony\app/config\config.yml', null) in FileLoader.php line 103
at FileLoader->import('config.yml', null, false, 'C:\wamp\www\symfony\app/config/config_dev.yml') in YamlFileLoader.php line 105
at YamlFileLoader->parseImports(array('imports' => array(array('resource' => 'config.yml')), 'framework' => array('router' => array('resource' => '%kernel.root_dir%/config/routing_dev.yml', 'strict_requirements' => true), 'profiler' => array('only_exceptions' => false)), 'web_profiler' => array('toolbar' => true, 'intercept_redirects' => false), 'monolog' => array('handlers' => array('main' => array('type' => 'stream', 'path' => '%kernel.logs_dir%/%kernel.environment%.log', 'level' => 'debug', 'channels' => array('!event')), 'console' => array('type' => 'console', 'channels' => array('!event', '!doctrine'))))), 'C:\wamp\www\symfony\app/config/config_dev.yml') in YamlFileLoader.php line 54
at YamlFileLoader->load('C:\wamp\www\symfony\app/config/config_dev.yml', null) in DelegatingLoader.php line 45
at DelegatingLoader->load('C:\wamp\www\symfony\app/config/config_dev.yml') in AppKernel.php line 48
at AppKernel->registerContainerConfiguration(object(DelegatingLoader)) in Kernel.php line 563
at Kernel->buildContainer() in Kernel.php line 476
at Kernel->initializeContainer() in Kernel.php line 117
at Kernel->boot() in Kernel.php line 166
at Kernel->handle(object(Request)) in app_dev.php line 30


Comment le résoudre?
Merci d'avance pour ceux qui voudront m'aider car depuis quelques jours je galère et je ne sais pas comment faire...
dsl si j'ai posté un long message ,mais c'est dans le but de mettre toutes les infos pour avoir une aide complete