Cannot setup sonata using composer
问题 I have set up symfony using composer. I have added some dependancies in my composer .json file like so: { "name": "symfony/framework-standard-edition", "license": "MIT", "type": "project", "description": "The \"Symfony Standard Edition\" distribution", "autoload": { "psr-0": { "": "src/" } }, "require": { "php": ">=5.3.3", "symfony/symfony": "2.3.*", "doctrine/orm": ">=2.2.3,<2.4-dev", "doctrine/doctrine-bundle": "1.2.*", "twig/extensions": "1.0.*", "symfony/assetic-bundle": "2.3.*", "symfony