PHP 8: Deprecated Functionality: Method ReflectionParameter::getClass() is deprecated in /lib/internal/Magento/Framework/Code/Reader/ClassReader.php on line 34

[pawan]

Preconditions (*)

1. PHP 8.0
2. Magento 2 - php8-develop branch

Steps to reproduce (*)

1. clone php8-develop branch
2. enable php 8
3. composer install
4. try to install magento by "sudo php bin/magento setup:install --base-url=http://127.0.0.1/m2_git/ --db-host=localhost --db-name=m2-git --db-user=root --db-password='MyPassword' --language=en_US --currency=USD --timezone=America/Chicago --use-rewrites=1 --search-engine=elasticsearch7 --elasticsearch-host=127.0.0.1 --elasticsearch-port=9200"

Expected result (*)

1. start magento installation

Actual result (*)

1. Deprecated Functionality: Method ReflectionParameter::getClass() is deprecated in /lib/internal/Magento/Framework/Code/Reader/ClassReader.php on line 34
2. 

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• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @pawan. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

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Please, add a comment to assign the issue: @magento I am working on this

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[smr-deploy]

Using something like:

$param->getType() && !$param->getType()->isBuiltin() 
              ? new ReflectionClass($param->getType()->getName())
              : null;

will fix that particular one, but I'd imagine there's a lot more in the codebase.

[pawan]

@smr-deploy , Yes I know the fix and waiting for someone to confirm issue!

[ProkopovVitaliy]

@magento I am working on this