WordPress network in multiple environments with a single database

Problem

I needed a way in my multisite setup to have multiple environments that shared the same database, but used different domains.

  • server1.example.com
  • server2.example.com
  • example.com

… each of those would point to the same database. This is easy to achieve in a standard WordPress install using define( 'WP_HOME', 'http://server1.example.com' ); and define( 'WP_SITEURL', 'http://server1.example.com' );.

When you add multisite to the mix it breaks.

The problem is that the wp_blogs table defines the domains too, so I needed a way to define them in the config file.

Solution

UPDATE: A more complete solution: https://github.com/developdaly/WordPress-Skeleton

Taking @chrisguitarguy‘s advice, I used sunrise.php to intercept the host and spoof it so that WordPress uses domain I customize to load the site content.

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