symfony - Symfony2 LTS: how to upgrade from 2.3 to 2.7? -


symfony 2.7 released on 30th april 2015 , current lts (long term support) version after 2.3 version. maintenance these versions end on may 2016 symfony 2.3 , may 2018 symfony 2.7. security fixes released during 1 year after end of maintenance both versions.

as suggested massimiliano arione in announce comments, changes required upgrade symfony 2.3 2.7 without having check minor upgrades (2.3 → 2.4, 2.4 → 2.5, etc.)?

as reminded med in comment, symfony2 developers have tried keep backward compatibility in 2.x branch. long don't want switch 3.0 branch later, can ignore changes between 2.3 , 2.7 because deprecation changes.

in order upgrade app symfony 2.3 symfony 2.7 you'll have update composer.json file:

([…] indicates unchanged code)

old (2.3) version:

{     […]     "autoload": {         "psr-0": { "": "src/" }     },     "require": {         "php": ">=5.3.3",         "symfony/symfony": "2.3.*",         "doctrine/orm": "~2.2,>=2.2.3,<2.5",         "doctrine/dbal": "<2.5",         "doctrine/doctrine-bundle": "~1.2",         "twig/extensions": "1.0.*",         "symfony/assetic-bundle": "~2.3",         "symfony/swiftmailer-bundle": "~2.3",         "symfony/monolog-bundle": "~2.4",         "sensio/distribution-bundle": "~2.3",         "sensio/framework-extra-bundle": "~3.0,>=3.0.2",         "sensio/generator-bundle": "~2.3",         "incenteev/composer-parameter-handler": "~2.0"     },     "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",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::preparedeploymenttarget"         ],         "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::preparedeploymenttarget"         ]     },     […]     "minimum-stability": "stable",     "extra": {         […]         "incenteev-parameters": {             "file": "app/config/parameters.yml"         },         "branch-alias": {             "dev-master": "2.3-dev"         }     } }

new (2.7) version:

{     […]     "autoload": {         "psr-4": { "": "src/", "symfonystandard\\": "app/symfonystandard/" }     },     "require": {         "php": ">=5.3.9",         "symfony/symfony": "2.7.*",         "doctrine/orm": "^2.4.8",         "doctrine/doctrine-bundle": "~1.4",         "symfony/assetic-bundle": "~2.3",         "symfony/swiftmailer-bundle": "~2.3",         "symfony/monolog-bundle": "~2.4",         "sensio/distribution-bundle": "~4.0",         "sensio/framework-extra-bundle": "^3.0.2",         "incenteev/composer-parameter-handler": "~2.0"     },     "require-dev": {         "sensio/generator-bundle": "~2.3",         "symfony/phpunit-bridge": "~2.7"     },     "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",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::removesymfonystandardfiles",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::preparedeploymenttarget"         ],         "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",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::preparedeploymenttarget"         ]     },     […]     "extra": {         […]         "symfony-assets-install": "relative",         […]         "branch-alias": {             "dev-master": "2.7-dev"         }     } }

summary:

  • symfony version updated
  • psr-4 used instead of psr-0
  • twig/extensions not installed default, may need add if use twig extensions
  • sensio/generator-bundle required in dev environment
  • scripts part has been updated
  • "minimum-stability": "stable", has been removed

once have updated composer.json file, have update dependencies:

composer update --prefer-dist -vv

then may need flush cache:

php app/console cache:clear --env=dev

note: used following command in order composer.json files:

# create symfony "2.3.*" project in "2.3" directory composer create-project symfony/framework-standard-edition "2.3" "2.3.*" --no-interaction -v # create symfony "2.7.*" project in "2.7" directory composer create-project symfony/framework-standard-edition "2.7" "2.7.*" --no-interaction -v # compare symfony 2.3 , 2.7 composer.json files diff -u 2.3/composer.json 2.7/composer.json

(we use 2.3.* , not 2.3 because want last version (2.3.31 today) , not initial release (2.3.0))

the diff available @ github too, composer.json file of symfony 2.3 has been updated multiple times, may different file.


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