无法使用composer设置奏鸣曲

我使用composer设置了symfony .

我在我的作曲家.json文件中添加了一些依赖项，如下所示：

{
"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/swiftmailer-bundle": "2.3.*",
    "symfony/monolog-bundle": "2.3.*",
    "sensio/distribution-bundle": "2.3.*",
    "sensio/framework-extra-bundle": "2.3.*",
    "sensio/generator-bundle": "2.3.*",
    "incenteev/composer-parameter-handler": "2.0",
    "sonata-project/admin-bundle": "dev-master",
    "sonata-project/doctrine-orm-admin-bundle": "dev-master",
    "sonata-project/intl-bundle": "dev-master",
    "sonata-project/user-bundle": "dev-master"
},
"scripts": {
    "post-install-cmd": [
        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
    ],
    "post-update-cmd": [
        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
    ]
},
"config": {
    "bin-dir": "bin"
},
"minimum-stability": "stable",
"extra": {
    "symfony-app-dir": "app",
    "symfony-web-dir": "web",
    "incenteev-parameters": {
        "file": "app/config/parameters.yml"
    },
    "branch-alias": {
        "dev-master": "2.3-dev"
    }
}
}

当我运行composer.phar update时，我收到以下消息：

使用包信息加载composer存储库更新依赖项（包括require-dev）无法将您的需求解析为可安装的软件包集 . 问题1 - sonata-project / intl-bundle dev-master的安装请求 - > sonata-project / intl-bundle [dev-master]可满足 . - sonata-project / intl-bundle dev-master需要ext-intl * - >系统中缺少所请求的PHP扩展intl . 问题2 - sonata-project / intl-bundle dev-master需要ext-intl * - >系统中缺少所请求的PHP扩展intl . - symfony / framework-standard-edition 2.3.x-dev需要sonata-project / intl-bundle dev-master - > sonata-project / intl-bundle [dev-master]可满足 . - symfony / framework-standard-edition 2.3.x-dev的安装请求 - > symfony / framework-standard-edition [2.3.x-dev]可满足 .

所以不知道更好我想我可能需要运行composr.phar install，这给了我：

使用包信息加载composer存储库从锁定文件安装依赖项（包括require-dev）警告：锁定文件与composer.json中的最新更改不是最新的 . 您可能会过时的依赖项 . 运行更新以更新它们 . 您的要求无法解析为可安装的软件包集 . 问题1 - symfony / framework-standard-edition 2.3.x-dev的安装请求 - > symfony / framework-standard-edition [2.3.x-dev]可满足 . - symfony / framework-standard-edition 2.3.x-dev需要sonata-project / admin-bundle dev-master - >找不到匹配的包 . 可能的原因： - 包裹名称中的拼写错误 - 根据您的最低稳定性设置，包裹在稳定版本中不可用，请参阅https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/讨论更多细节 . 阅读http://getcomposer.org/doc/articles/troubleshooting.md以了解更多常见问题 .

我按照sonata-project.org的说明进行操作，但没有取得任何进展 .

我正在犯某种非常明显的错误吗？