Test a Symfony BETA minor version

Published on 2019-05-11 • Modified on 2023-10-29

Symfony 6.4 beta2 is out as of the 2023-10-29, you can test it by modifying your composer.json file. The following JSON snippet shows you the parts that you must change in your file. You also have to change the "6.3" requirement to "^6.4" like below with the symfony/http-kernel dependency. You can also put "*" but you will get a warning when running composer validate. Then run composer update.
Note that this upgrade should be avoided for a production project. Don't forget to report issues you may find on Github (I migrated from Symfony 6.3, it was, therefore the easiest possible migration path). Testing beta versions is very important and is one of the easiest way to contribute to Symfony. 🙂

[2023-10-29] Update for Symfony 6.4 beta2.

    "minimum-stability": "beta",
    "require": {
        "symfony/http-kernel": "^6.4",
    "extra": {
        "symfony": {
            "require": "6.4.*",

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