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Level Level plugin autoloader

When 0-loader.php is inserted into the mu-plugins directory it will load all subdirectory plugin as it would normal plugins.

Configuration options

You have multiple options to manipulate where the Plugin Loader will look for a vendor folder. Define one of the following values in wp-config:

1. Default == wp-content directory

If you define nothing it will load the same as 2. wp-content directory.

2. wp-content directory

Load from the parent directory above mu-plugins (should be the wp-content dir). This is only used when no LL_AUTOLOAD_DIR is set.

define('LL_AUTOLOAD_CONTENT_DIR', true);

3. Child theme

Use the current Child theme via get_stylesheet_directory as the theme folder containing the vendor folder. This is only used when no LL_AUTOLOAD_DIR is set.

define('LL_AUTOLOAD_USE_CHILD', true);

4. Parent/default theme

Use the current parent theme via get_template_directory as the theme folder containing the vendor folder. This is only used when no LL_AUTOLOAD_DIR is set.

define('LL_AUTOLOAD_USE_PARENT', true);

5. Custom path

Use a specific directory. The script will still append /vendor/autoload.php to this path.

define('LL_AUTOLOAD_DIR', '/path/to/wordpress/theme/');

Overview

Setting Result
Nothing wp-content directory
define( 'LL_AUTOLOAD_DIR', '/tmp/' ); /tmp/
define( 'LL_AUTOLOAD_CONTENT_DIR', true ); wp-content directory
define( 'LL_AUTOLOAD_USE_CHILD', true ); Stylesheet directory (child theme)
define( 'LL_AUTOLOAD_USE_PARENT', true ); Template directory (parent theme)

Pre and Post autoload

Pre autoload

Right before the vendor autoload file is loaded, the pre-autoload.php file in the directory specified as the autoload directory is required if it exists.

This file can be used to set environment variables required in composer loaded dependencies.

Post autoload

Right after the vendor autoload file is loaded, but before the mu-plugins are loaded, the post-autoload.php file in the directory specified as the autoload directory is required if it exists.

This file can be used to bootstrap/configure mu-plugin loaded dependencies, or trigger actions that need to happen as early as possible, but autoloading to be set up.

Adding logging is an example of this. You probably require the Monolog composer dependency, but want it to be bootstrapped before we load the mu-plugins.

Upgrading from v2.x to v3.x

In v3, the wp-content directory loads by default, instead of the template directory in v2. To restore behaviour, set define( 'LL_AUTOLOAD_USE_PARENT', true ); in wp-config.php.

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