Add PHP 8.1 Support

[alexander-schranz]

Q	A
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no
Fixed tickets	fixes #
Related issues/PRs	#
License	MIT
Documentation PR	sulu/sulu-docs#

What's in this PR?

Add support for PHP 8.1

Why?

The first RC of PHP 8.1 was released https://www.php.net/archive/2021.php#2021-09-02-1, and it would great if sulu could support PHP 8.1. This PR currently should tell us where we need todo some work to get compatible with PHP 8.1.

Checklist:

Packages:

• composer/composer (Fix GithubDriver nextPage deprecation notice with no link header composer/composer#10088)
• phpspec/prophecy (Add PHP 8.1 support phpspec/prophecy#533) (1.14.0)
• laminas/laminas-code (Support for PHP 8.1 laminas/laminas-code#86)
  • 4.5 release
• Add compatibility for PHP 8.1 goodby/csv#87 (probably unmaintained)
  • Replaced by fork https://github.com/handcraftedinthealps/goodby-csv
• MassiveSearch Metadata Classes: https://github.com/massiveart/MassiveSearchBundle/blob/7e9c329a85a8baaca6bd299e050a1209f0915d04/Search/Metadata/ClassMetadata.php#L81-L93

Nice to have:

• friendsofphp/php-cs-fixer (PHP 8.1 support PHP-CS-Fixer/PHP-CS-Fixer#5945) (not required)
  • PHP 8.1 by reference has space before PHP-CS-Fixer/PHP-CS-Fixer#5993

Changes:

• User Serializable (https://php.watch/versions/8.1/serializable-deprecated) (74cf4fd)
• No optional Parameter before required (9a6a7ea)

[alexander-schranz]

required to install new packages: https://blog.packagist.com/deprecating-composer-1-support/

/cc @chirimoya

[alexander-schranz]

To make it clear this would mean newer versions can only be installed when using composer v2. What do you think?

[alexander-schranz]

As discussed with @chirimoya we will fix the 8.1 issues on our side in the 2.2 and 2.3 branches. But only the 2.4 branch we will use the fork in 2.2 and 2.3. So with begin of Sulu 2.4 we require composer 2.

[alexander-schranz]

For all subscribing this PR sulu itself will be compatible to PHP 8.1 with the next Versions of 2.2 and 2.3. But if you want to use PHP 8.1 in this projects you need to require an additional package:

composer require handcraftedinthealps/goodby-csv:^1.4

Which will provide PHP 8.1 support for goodby/csv package which we forked. Begin from Version 2.4 we will require that package. As it is a new Packagist package from the Begin of Sulu 2.4 sulu is only compatible with Composer 2. See the following blog post by the composer maintainers: https://blog.packagist.com/deprecating-composer-1-support/.

[alexander-schranz]

Laminas-code 4.5 is now also released so its now 8.1 can be used with stable packages.