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Denis Brumann
 @dbrumann
 [email protected] Migrating to Symfony 4 1 from Symfony 2 & 3

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Denis Brumann
 @dbrumann
 [email protected] 2

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Denis Brumann
 @dbrumann
 [email protected] 3

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Denis Brumann
 @dbrumann
 [email protected] 4 Denis Brumann Software Developer Berlin, Germany

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Denis Brumann
 @dbrumann
 [email protected] 5 https://symfony.com/doc/current/contributing/community/releases.html

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Denis Brumann
 @dbrumann
 [email protected] 6 https://symfony.com/roadmap Symfony Version End of Support End Of Security Fixes 2.8 (LTS) November 2018 November 2019 3.4 (LTS) November 2020 November 2021 4.0 July 2018 January 2019

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Denis Brumann
 @dbrumann
 [email protected] 7 Flex is not your only option

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Denis Brumann
 @dbrumann
 [email protected] 8 composer update symfony/symfony

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Denis Brumann
 @dbrumann
 [email protected] 9

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Denis Brumann
 @dbrumann
 [email protected] 10 https://symfony.com/blog/new-in-symfony-3-3-persisted-deprecation-logs

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Denis Brumann
 @dbrumann
 [email protected] 11 Step 1: Add symfony/flex as a dependency from Symfony 3.4

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Denis Brumann
 @dbrumann
 [email protected] 12 Step 2: Remove the symfony/symfony package

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Denis Brumann
 @dbrumann
 [email protected] 13 Step 3: Make sure symfony/symfony is not kept

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Denis Brumann
 @dbrumann
 [email protected] 14 optionally: stay with Symfony 3.4 first

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Denis Brumann
 @dbrumann
 [email protected] 15 Step 4: Manually require your Symfony dependencies

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Denis Brumann
 @dbrumann
 [email protected] 16 Step 5: Copy & adjust your configuration

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Denis Brumann
 @dbrumann
 [email protected] 17 Symfony 3 Symfony 4

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Denis Brumann
 @dbrumann
 [email protected] 17 Symfony 3 Symfony 4

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Denis Brumann
 @dbrumann
 [email protected] 19

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Denis Brumann
 @dbrumann
 [email protected] 19

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Denis Brumann
 @dbrumann
 [email protected] 19

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Denis Brumann
 @dbrumann
 [email protected] 19

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Denis Brumann
 @dbrumann
 [email protected] 19

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Denis Brumann
 @dbrumann
 [email protected] 20 Step 6a: Move src/AppBundle/* to src/* Step 6b: Move namespace AppBundle\ to App\ Step 6c: Update autoload-section in composer.json

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Denis Brumann
 @dbrumann
 [email protected] 21

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Denis Brumann
 @dbrumann
 [email protected] 22 composer require acme/my-bundle

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Denis Brumann
 @dbrumann
 [email protected] 23 { "require": { "acme/my-bundle": "dev-master" }, "repositories": [ { "type": "vcs", "url": "[email protected]:acme/my-bundle.git" } ] }

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Denis Brumann
 @dbrumann
 [email protected] 24 Step 7: Move templates, translations & assets

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Denis Brumann
 @dbrumann
 [email protected] 25 Step 8: Create public/index.php

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Denis Brumann
 @dbrumann
 [email protected] 26 Step 9: Create bin/console

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Denis Brumann
 @dbrumann
 [email protected] 27 https://symfony.com/doc/current/setup/flex.html#upgrade-to-flex https://symfony.com/doc/current/setup/upgrade_major.html