Must Use Setup

Object Cache Pro can run as a Must-Use Plugin and can even be located outside the mu-plugins directory, when the WP_REDIS_DIR constant is used.

Using Composer #

If the plugin is installed using Composer, a post-update-cmd script can that automatically configure the setup for you.

The script below will copy the stub as well as the plugin directory to the mu-plugins directory after each Composer update.

{
  "scripts": {
    "post-update-cmd": [
      "cp wp-content/plugins/redis-cache-pro/stubs/mu-plugin.php wp-content/mu-plugins/redis-cache-pro.php",
      "cp -r wp-content/plugins/redis-cache-pro wp-content/mu-plugins/"
    ]
  },
}

Plugin Directory #

In some cases, like shared environments or managed hosting, Object Cache Pro might needs to be located outside your web root directory. This can easily be accomplished the WP_REDIS_DIR constant and the must-use stub.

First, define the constant near your WP_REDIS_CONFIG.

define('WP_REDIS_DIR', '/path/to/redis-cache-pro');

define('WP_REDIS_CONFIG', [
    // ...
]);

Next, set up a Composer post-update-cmd script in your composer.json to install the plugin and copy the must-use stub:

{
  "scripts": {
    "post-update-cmd": [
      "cd /path/to/ && composer update",
      "cp /path/to/redis-cache-pro/stubs/mu-plugin.php wp-content/mu-plugins/redis-cache-pro.php"
    ]
  }
}

That’s it.