Php 未定义的类常数'；API 2-5-BC版本'；

创建一个新的2.3项目，然后向

composer.json

添加一组依赖项后，在

composer update

结束时运行

缓存：clear

命令时，会发生以下错误：

致命错误：中未定义的类常量“API\U版本\U 2\U 5\U BC” …\vendor\symfony\FrameworkBundle\symfony\bundle\FrameworkBundle\DependencyInjection\FrameworkExtension.php 在线758

添加的依赖项取自一个基于Symfony 2.5的完整功能现有项目。我们的目标是尝试将symfonycmf添加到项目中，主要是看看它是否添加了所需的功能

在

API\u VERSION\u 2\u 5\u BC

上搜索显示它与验证相关。是否有解决办法，或者我应该放弃这种努力

composer.json（部分）

---

生成2.3项目有什么原因吗？@Stony如上所述，我希望尝试将CMF添加到现有项目中。由于依赖关系不够稳定，当它的

composer.json

需要Symfony

~2.4

时，我无法简单地将它添加到项目中。

"repositories": [
    {
        "type": "package",
        "package": {
            "name": "jquery/jquery",
            "version": "1.11.1",
            "dist": {
                "url": "http://code.jquery.com/jquery-1.11.1.js",
                "type": "file"
            }
        }
    }
],
"require": {
    "php": ">=5.3.3",
    "symfony/symfony": "2.3.*",
    "doctrine/orm": "~2.2,>=2.2.3",
    "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",
    "friendsofsymfony/user-bundle": "2.0.*@dev",
    "knplabs/knp-menu": "2.0.*@dev",
    "knplabs/knp-menu-bundle": "2.0.*@dev",
    "pugx/multi-user-bundle": "3.0.*@dev",
    "doctrine/doctrine-fixtures-bundle": "2.2.*",
    "liip/functional-test-bundle": "1.0.*@dev",
    "psliwa/pdf-bundle": "1.0.@dev",
    "braincrafted/bootstrap-bundle": "2.1.*",
    "oyejorge/less.php": "~1.5",
    "twbs/bootstrap": "3.0.*",
    "jquery/jquery":  "1.11.*",
    "egeloen/ckeditor-bundle": "~2.0",
    "helios-ag/fm-elfinder-bundle": "~3.0"
},