Symfony -将旧项目升级(v 2.6)到3.4

Question

我有一个Symfony网络应用程序，需要从Symfony 2.6升级到3.4。是否有一个标准化的、简陋的composer.json来显示当前版本所需的内容？演示应用程序在github上的文件似乎充满了一些额外的东西，我不完全确定我需要这些东西。理想情况下，我希望更新现有的composer.json，并在可能弹出的地方熄灭向后兼容性火。

编辑:我现在的作曲家是-

{
    "license": "Private",
    "type": "project",
    "description": "Home/e-commerce site",
    "autoload": {
        "psr-0": { "": "src/", "SymfonyStandard": "app/" }
    },
    "require": {
        "php": ">=5.3.3",
        "symfony/symfony": "2.6.*",
        "doctrine/orm": "~2.2,>=2.2.3",
        "doctrine/doctrine-bundle": "~1.2",
        "twig/extensions": "~1.0",
        "symfony/assetic-bundle": "2.6.*",
        "symfony/swiftmailer-bundle": "~2.3",
        "symfony/monolog-bundle": "~2.4",
        "sensio/distribution-bundle": "~3.0",
        "sensio/framework-extra-bundle": "~3.0",
        "incenteev/composer-parameter-handler": "~2.0",
        "jms/security-extra-bundle": "dev-master",
        "jms/di-extra-bundle": "dev-master",
        "friendsofsymfony/user-bundle": "2.0.*@dev",
        "roave/security-advisories": "dev-master"
    },
    "require-dev": {
        "sensio/generator-bundle": "~2.3"
    },
    "scripts": {
        "post-root-package-install": [
            "SymfonyStandard\\Composer::hookRootPackageInstall"
        ],
        "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",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::removeSymfonyStandardFiles"
        ],
        "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",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::removeSymfonyStandardFiles"
        ]
    },
    "config": {
        "bin-dir": "bin"
    },
    "extra": {
        "symfony-app-dir": "app",
        "symfony-web-dir": "web",
        "incenteev-parameters": {
            "file": "app/config/parameters.yml",
            "keep-outdated": true
        },
        "branch-alias": {
            "dev-master": "2.6-dev"
        }
    }
}

Answer 1

尝试运行composer create-project symfony/framework-standard-edition -它将使用默认的composer.json设置一个基本的项目。如下所示：

{
    "name": "name",
    "license": "proprietary",
    "type": "project",
    "autoload": {
        "psr-4": {
            "": "src/"
        },
        "classmap": [
            "app/AppKernel.php",
            "app/AppCache.php"
        ]
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        },
        "files": [
            "vendor/symfony/symfony/src/Symfony/Component/VarDumper/Resources/functions/dump.php"
        ]
    },
    "require": {
        "php": ">=5.5.9",
        "doctrine/doctrine-bundle": "^1.6",
        "doctrine/orm": "^2.5",
        "incenteev/composer-parameter-handler": "^2.0",
        "sensio/distribution-bundle": "^5.0.19",
        "sensio/framework-extra-bundle": "^3.0.2",
        "symfony/monolog-bundle": "^3.1.0",
        "symfony/polyfill-apcu": "^1.0",
        "symfony/swiftmailer-bundle": "^2.3.10",
        "symfony/symfony": "3.3.*",
        "twig/twig": "^1.0||^2.0"
    },
    "require-dev": {
        "sensio/generator-bundle": "^3.0",
        "symfony/phpunit-bridge": "^3.0"
    },
    "scripts": {
        "symfony-scripts": [
            "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",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::prepareDeploymentTarget"
        ],
        "post-install-cmd": [
            "@symfony-scripts"
        ],
        "post-update-cmd": [
            "@symfony-scripts"
        ]
    },
    "config": {
        "sort-packages": true
    },
    "extra": {
        "symfony-app-dir": "app",
        "symfony-bin-dir": "bin",
        "symfony-var-dir": "var",
        "symfony-web-dir": "web",
        "symfony-tests-dir": "tests",
        "symfony-assets-install": "relative",
        "incenteev-parameters": {
            "file": "app/config/parameters.yml"
        },
        "branch-alias": null
    }
}

Symfony的升级指南包含关于您可能遇到的贬义的有用信息。

Answer 2

这可不容易。因此，首先，您可以使用symfony安装程序设置一个新项目。

symfony new my_project

在示例项目中，您可以使用该版本的实际composer.json。下一步是查看所有扩展，如果它们是最新版本的话。下一步是在升级指导什么已经改变和改变所有的新东西，从2.6到3.3有很多的存根已经改变了。您可以在存储库中找到升级指令。

https://github.com/symfony/symfony/blob/master/UPGRADE-3.0.md

例如。您必须修复所有问题并更改代码，直到它再次工作为止。

Answer 3

除非您确实需要使用3.* (PHP 7或其他无法选择版本的原因)，否则可以更新为LTS版本：

Symfony路线图

目前，2.8.22是一个长期支持版本。这意味着您只需要从2.6更新到2.8，就可以在一段时间内(安全和文档方面)。

有关详细信息，您可以在上面的页面上使用版本检查器。结果表明，3.4的支持时间比2.8长了2年，但LTS也很好。

考虑到您的具体情况，，如果采取更小的步骤可能是一个更好的选择。无论如何，大多数从2.6到2.8的变化都是达到3.4所必需的。

• 2.8： 2018年11月：结束对bug修复的支持 2019年11月：结束对安全修复的支持
• 3.4： Nov 2020:结束对bug修复的支持 11月2021:对安全修复的端支持