Upgrade/validate PHP 8.3

[SvenAelterman]

PHP 8.2 extended (security) support ends 31 December 2026. See https://www.php.net/supported-versions.php

[SvenAelterman]

Quick validation indicates that using the PHP 8.3 stack works fine for the deployment. However, as of today, REDCap does not yet support 8.3 officially, so keeping this issue on the backlog.

[SvenAelterman]

Test code exists at https://github.com/SvenAelterman/azure-redcap-paas/tree/84-php83

[plitwin]

REDCap definitely supports PHP 8.3 and my group is running on it in an Azure App Service, without issue. I suspect that really old versions of REDCap wouldn't work with PHP 8.3, but if they were that old, they wouldn't work with any PHP 8.x version so not to worry about.

[SvenAelterman]

REDCap 15 supports PHP 8.3 now and we've just gotten access to v15. Moving this to active from the backlog.