Troubleshooting Bedrock 718

See roots/bedrock#718.

Setup

trellis init
trellis up

This should get your local provisioned with Redis and two sites running with WP Redis plugin installed & activated.

Links:

• site1.test Admin
• site2.test Admin

Steps to reproduce:

• Login (admin:admin), view Settings > General and confirm site details are correct.
• Go to config/application.php in both sites and uncomment lines 15 & 41, comment out line 40. This is the change introduced in 714.
• Check both sites. If one has changed to show details of the other, you are seeing the issue.
• Restart Redis on the server sudo systemctl restart redis-server and/or flush cache wp cache flush from the site folders. Confirm it does not solve the problem.
• Remove web/app/object-cache.php from the site that is showing incorrect information. Note this corrects the information.
• Enable Redis for that site again wp redis enable (you may need to reactivate the plugin from within WP-Admin). Note it's now incorrect.

Outcome

In setting this repo up I ultimately found the real cause: using getenv(). This is actually noted in Bedrock 714.

To fix, in config/application.php for both sites, replace getenv() for env(). In this specific case the only usage is

// Unique cache key salt for memcached/redis
- Config::define('WP_CACHE_KEY_SALT', getenv('DB_NAME'));
+ Config::define('WP_CACHE_KEY_SALT', env('DB_NAME'));