All these tests are meant to run with OPcache available, and some will even fail inevitably without it, so we add OPcache as SKIPIF requirement.
When disabling opcache during the request via opcache.enable ini setting, make sure we also disable ZCG(accelerator_enabled).
Also add PHP_TEST_EXTRA_ARGS environment variable, which allows to pass on -c, -d etc flags provided by run-tests.php. Otherwise we won't get the built-in server to run with opcache.
Christoph M. Becker