Symfony2 Shell.php error on production server

Question

I get the following error in app_dev.php on my production server:

ErrorException: Notice: Undefined variable: output in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/Finder/Shell/Shell.php line 59

1. in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/Finder/Shell/Shell.php line 59
2. at ErrorHandler->handle('8', 'Undefined variable: output', '/www/acme/www/vendor/symfony/symfony/src/Symfony/Component/Finder/Shell/Shell.php', '59', array('command' => 'find')) in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/Finder/Shell/Shell.php line 59
3. at Shell->testCommand('find') in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/Finder/Adapter/AbstractFindAdapter.php line 123
4. at AbstractFindAdapter->isSupported() in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/Finder/Adapter/GnuFindAdapter.php line 30
5. at GnuFindAdapter->isSupported() in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/Finder/Finder.php line 700
6. at Finder->searchInDirectory('/www/acme/www/vendor/symfony/symfony/src/Symfony/Component/Validator/Resources/translations') in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/Finder/Finder.php line 628
7. at Finder->getIterator() in /www/acme/www/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php line 555
8. at FrameworkExtension->registerTranslatorConfiguration(array('fallback' => 'pl', 'enabled' => true), object(ContainerBuilder)) in /www/acme/www/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php line 106
9. at FrameworkExtension->load(array(array('translator' => array('fallback' => 'pl'), 'secret' => 'eea6ad638afadb62cd7bc360e98f7d3b', 'router' => array('resource' => '/www/acme/www/app/config/routing.yml', 'strict_requirements' => true), 'form' => true, 'csrf_protection' => true, 'validation' => array('enable_annotations' => true), 'templating' => array('engines' => array('twig')), 'trust_proxy_headers' => false, 'default_locale' => 'pl', 'session' => null), array('router' => array('resource' => '/www/acme/www/app/config/routing_dev.yml'), 'profiler' => array('only_exceptions' => false))), object(ContainerBuilder)) in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Compiler/MergeExtensionConfigurationPass.php line 42
10. at MergeExtensionConfigurationPass->process(object(ContainerBuilder)) in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DependencyInjection/MergeExtensionConfigurationPass.php line 39
11. at MergeExtensionConfigurationPass->process(object(ContainerBuilder)) in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Compiler/Compiler.php line 119
12. at Compiler->compile(object(ContainerBuilder)) in /www/acme/www/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ContainerBuilder.php line 494
13. at ContainerBuilder->compile() in /www/acme/www/app/bootstrap.php.cache line 950
14. at Kernel->buildContainer() in /www/acme/www/app/bootstrap.php.cache line 859
15. at Kernel->initializeContainer() in /www/acme/www/app/bootstrap.php.cache line 571
16. at Kernel->boot() in /www/acme/www/app/bootstrap.php.cache line 614
17. at Kernel->handle(object(Request)) in /www/acme/www/web/app_dev.php line 29

Everything works fine on my localhost so it can be something wrong with the server configuration.

Answer 1

Hosting provider has turned PHP exec function off because of the security reasons. That's why above error occurred. Does anyone know if its possible to bypass exec function in Symfony2 - I mean if it's possible to run symfony2 on the server with exec function turned off?

Answer 2

I've got the same problem with my hosting, with php safe_mode off. Actually there is a todo, but I dont know when they will fix it.

// todo: find a better way (command could not be available)
exec('command -v '.$command, $output, $code);

as seen in Symfony\Component\Finder\Shell\Shell;