PHP 8.0 support

[boesing]

Feature Request

Q	A
New Feature	yes

Summary

To be prepared for the december release of PHP 8.0, this repository has some additional TODOs to be tested against the new major version.

In order to make this repository compatible, one has to follow these steps:

• Modify composer.json to provide support for PHP 8.0 by adding the constraint ~8.0.0
• Modify composer.json to drop support for PHP less than 7.3
• Modify composer.json to implement phpunit 9.3 which supports PHP 7.3+
• Modify .travis.yml to ignore platform requirements when installing composer dependencies (simply add --ignore-platform-reqs to COMPOSER_ARGS env variable)
• Modify .travis.yml to add PHP 8.0 to the matrix (NOTE: Do not allow failures as PHP 8.0 has a feature freeze since 2020-08-04!)
• Modify source code in case there are incompatibilities with PHP 8.0

[stojanovicdusan]

It is not possible to do it until all other required dependency is updated to PHP 8.0.

[boesing]

Not 100% sure but PHP 8 has --ignore-platform-req=php set in github action.
Bit I dont think that this package is already migrated to GHA.

@weierophinney Do we have ignore platform req enabled?

[boesing]

Yup, here you go https://github.com/laminas/laminas-continuous-integration-action/blob/92f18a56222df7f3d1896de178b6c0531c1af5a0/entrypoint.sh#L82

Thus, you can still create a PR which supports PHP 8.0 for this specific package. No need to have the whole dependency tree verified just to see if there are TODOs in this package.

[boesing]

@stojanovicdusan I've prepared this repository so you can create a PR for PHP 8.0 with the instructions in this issue 👍🏼