Support PHP 8.4

[evs-xsarus]

Description

Running, for instance, the CLI gives:

evs@evs-precision3590:~/sites/sie/magento (preview/staging) $ p84 ./bin/magento 

Deprecated: sq(): Implicitly marking parameter $id as nullable is deprecated, the explicit nullable type must be used instead in /sites/sie/magento/vendor/codeception/module-sequence/src/Codeception/Util/sq.php on line 7

Call Stack:
    0.0003     674144   1. {main}() /sites/sie/magento/bin/magento:0
    0.0003     684632   2. require('/sites/sie/magento/app/bootstrap.php') /sites/sie/magento/bin/magento:14
    0.0004     691144   3. require_once('/sites/sie/magento/app/autoload.php') /sites/sie/magento/app/bootstrap.php:44
    0.0004     695032   4. include('/sites/sie/magento/vendor/autoload.php') /sites/sie/magento/app/autoload.php:51
    0.0005     702136   5. ComposerAutoloaderInit03ea9dc0c4d8b1153a18e95367a00222::getLoader() /sites/sie/magento/vendor/autoload.php:25
    0.0144    4235600   6. {closure:/sites/sie/magento/vendor/composer/autoload_real.php:37-43}($fileIdentifier = 'a3b8fb13a112e3be232ab3c07b8a884f', $file = '/sites/sie/magento/vendor/composer/../codeception/module-sequence/src/Codeception/Util/sq.php') /sites/sie/magento/vendor/composer/autoload_real.php:45

Expected behavior

Run Magento with PHP 8.4

Benefits

No response

Additional information

PHP 8.4.3 has just been released https://www.php.net/ChangeLog-8.php#8.4.3 . When can we expect to have support in Magento ? Seems like 2.4.8 will still be on PHP 8.3

https://experienceleague.adobe.com/en/docs/commerce-operations/release/notes/adobe-commerce/2-4-8

This release includes the following PHP enhancements:

PHP 8.1: This release removes PHP 8.1 compatibilty for Adobe Commerce 2.4.8. You must upgrade to PHP 8.3 before upgrading to Adobe Commerce 2.4.8.
PHP 8.2: One of the significant changes in PHP 8.2 involves the deprecation of passing null to non-nullable internal function parameters. This release addresses deprecated PHP 8.1 features in core platform components and ensures compatibility with PHP 8.2.

Release note

No response

[m2-assistant]

Hi @evs-xsarus. Thank you for your report.
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[devchris79]

Magento 2.4.8 supports PHP 8.3 because it was the latest at the time. If you have a look at the Release schedule you will see the first beta version was released in October, PHP 8.4 was released in the following month (November).

It seems the major Magento updates are going to be once a year, so I would suspect 2.4.9 sometime next year will adopt PHP 8.4.

[hostep]

@evs-xsarus, indeed, Magento only releases one new version per year (not counting security patch releases), and it's usually about half a year after a new PHP version was released.
So be a bit patient, a lot of Magento's dependencies from 3rd parties also require updates and therefore Adobe has this half year of delay after a new PHP version gets released to wait for their dependencies to become compatible and to have time enough to fix their own code and test it properly. But it's coming, for example this big change recently got merged, which is to be included in Magento 2.4.8-beta2 in a few weeks, and later - in April - in 2.4.8 itself.