See: https://travis-ci.org/github/phpmyadmin/phpmyadmin/jobs/732245185#L496
See: https://pecl.php.net/package/APC
See: https://www.php.net/manual/en/book.apcu.php#125057
APCu is the official replacement for the outdated APC extension. APC provided both opcode caching (opcache) and object caching. As PHP versions 5.5 and above include their own opcache, APC was no longer compatible, and its opcache functionality became useless. The developers of APC then created APCu, which offers only the object caching (read "in memory data caching") functionality (they removed the outdated opcache).
Should we remove APC from 5.0.x series ?
So APC hasn't been usable in PHP since 5.5? In that case, we can definitely remove APC support.
Should we migrate to APCu?
Most helpful comment
So APC hasn't been usable in PHP since 5.5? In that case, we can definitely remove APC support.
Should we migrate to APCu?