Add PHP8.1 support

[ChristophWurst]

Ref nextcloud/groupware#27

• Update info.xml requirements
• Update composer.json requirements
• Update test matrix
• Update lint matrix
• Fix the code
  • PHP 8.1 deprecation notices bytestream/Mail#3
  • Add \ReturnTypeWillChange for PHP8.1 compatibility bytestream/Mail#2
  • Use magic __serialize/__unserialize to phase out Serializable bytestream/Mail#1
  • Fix PHP8.1 tentative return types bytestream/Imap_Client#3
  • Fix PHP8.1 DateTime constructor null time bytestream/Imap_Client#4
  • Fix PHP8.1 tentative return types bytestream/Mime#2
  • Fix string replace with null bytestream/Mime#3
  • Fix PHP8.1 tentative return types bytestream/Support#2
  • Fix PHP8.1 tentative return types bytestream/Stream_Filter#2
• Requires Bump bytestream/horde-mail from 2.7.0 to 2.7.1 #6532
• Requires Bump bytestream/horde-stream-filter from 2.1.0 to 2.1.1 #6536
• Requires Bump bytestream/horde-support from 2.3.0 to 2.3.1 #6537

[miaulalala]

nextcloud/server#31212

FYI.

Detect encoding is not working as expected any longer, see php/php-src#8279

[st3iny]

Detect encoding is not working as expected any longer, see php/php-src#8279

Damn, what can we do about it? Wait for an upstream patch of php?

PS: Also relevant php/php-src#8439

[come-nc]

Detect encoding is not working as expected any longer, see php/php-src#8279

Damn, what can we do about it? Wait for an upstream patch of php?

PS: Also relevant php/php-src#8439

You can use mb_check_encoding in a loop to get the same behavior as before from mb_detect_encoding.

[ChristophWurst]

assert($type instanceof Identifier || $type instanceof Name || $type instanceof ComplexType)
Script phpunit -c tests/phpunit.unit.xml --testdox --debug -v handling the test:unit event returned with error code 2

it now also fails locally when I run XDEBUG_MODE=coverage composer run test:unit

Related https://stackoverflow.com/questions/69793527/gitlab-testing-suddenly-get-error-with-symfony-project
https://github.com/sebastianbergmann/php-code-coverage/blob/3614a0f658bf1f10cf2dddfcb6e47a7ac5705a86/src/StaticAnalysis/CodeUnitFindingVisitor.php#L161

[ChristophWurst]

New plan: disable coverage for PHP8.1 for now.

[nickvergessen]

https://php.watch/versions/8.1/ReturnTypeWillChange

Oo interesting stuff