‘get_plugins’ is intended to be used only with regular plugins, and also it looks at plugin headers, and return only plugins that have valid one, like
/* Plugin Name: A plugin */
However mu-plugins can work even without that headers.
Also consider that with WP 3.9 was introduced the function wp_register_plugin_realpath that should be used to ensure compatibility with symbolink linked folders.
According to a post of Ryan McCue on make.wordpress.org a sinple, but working mu plugins loader should be something like this:
<?php
$plugins = array(
'my-mu-plugin/my-mu-plugin.php'
);
foreach ( $plugins as $plugin ) {
$path = dirname( __FILE__ ) . "https://wordpress.stackexchange.com/" . $plugin;
// Add this line to ensure mu-plugins subdirectories can be symlinked
wp_register_plugin_realpath( $path );
include $path;
}
The $plugins array here is hardcoded. Sincerly I found this approach more functional than the glob + get_plugins
because:
- it’s faster
- it works for mu plugins that does not have any plugins header
Sure it need to manually add a line on the array every time you install a new plugin, but imho this is not a great issue, and also gives ability to easily deactivate a mu plugin.