PHP 8.0 Support

[ankitpokhrel]

Q	A
Status	Final
Type	Improvement
BC Break	None
Release Date	N/A
Release Version	2.1.0

Dependencies

• guzzlehttp/guzzle (Support added in v7.2.0. No changes needed.)
• nesbot/carbon (Support added in >= v2.13.0. No changes needed.)
• predis/predis (No changes needed for now. v2.0.0 will have full PHP8 support.)
• ramsey/uuid (Support added in v3.9.2. No changes needed.)
• symfony/* (Symfony packages already supports PHP 8.0)

Dev Dependencies

• friendsofphp/php-cs-fixer (Remove from dev dependency PHP 8.0 support PHP-CS-Fixer/PHP-CS-Fixer#4702)
• mockery/mockery (Support added in v1.4.1. Requires PHP >= 7.3. Also see Full PHP 8.0 Support mockery/mockery#1083.)
• phpunit/phpunit (Upgrade to PHPUnit >= 9.3. This requires PHP >= 7.3)
• php-mock/php-mock (Remove php-mock dependency - test: Remove php-mock dependency #308)

Other Tasks

• PHP 8.0 for development (dev: Use official php docker image #311, dev: Add ability to switch seamlessly between PHP7 and PHP8 #313, dev: Add PHP8 build scripts #314).
• Figure out if a major release is required: No
• Drop PHP 7.2 support (?).: No
• Check if we can completely get rid of some dependencies.
• Check if predis/predis dependency can be gracefully removed or deprecated (related Redis cluster mode #287). This will be done in the next major release.
• Manual tests to make sure everything works as expected.

Note

• All new changes must be compatible with PHP 8.0.
• Recommended PHP version is >= 7.3 but the changes are still compatible with 7.2.
• We will keep the build step nightly and it is allowed to fail. Once the Travis target for PHP8 is added, we can update our step.

[codecov]

Codecov Report

Merging #307 (daa2953) into master (dca27e7) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #307   +/-   ##
=========================================
  Coverage     99.68%   99.68%           
  Complexity      351      351           
=========================================
  Files            20       20           
  Lines           940      940           
=========================================
  Hits            937      937           
  Misses            3        3           

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