container.php

<?php
/**
 * Static accessor for plugin container
 *
 * @return array
 */
function wordpress_plugin()
{
    static $container;
    if (!$container) {
        $container = [];
        /**
         * Action runs when PLUGIN_NAME is initialized
         *
         * @param array $container Plugin container
         */
        do_action('wordpress_plugin', $container);
    }
    return $container;
}