flush-redis-cache.php

<?php

# Check: https://onexa.nl/wordpress/toolbar-link-redis-object-cache/

/**
 * Add a link to the Admin Toolbar to easily flush the Redis cache (Redis Object Cache plugin)
 * 
 * @author Hiranthi Herlaar, onexa.nl
 * @version 2.0
 *
 * @var $wp_admin_bar > https://codex.wordpress.org/Class_Reference/WP_Admin_Bar
**/
if ( ! function_exists( 'redis_add_toolbar_link') )
{
	function redis_add_toolbar_link( $wp_admin_bar )
	{
		if ( current_user_can( 'manage_options' ) && is_plugin_active( 'redis-cache/redis-cache.php' ) )
		{
			# Redis Object Cache < 2.x || => 2.x
			$RedisObjectCache = ( class_exists( 'RedisObjectCache' ) ) ? new RedisObjectCache : redis_object_cache();
				
			if ( $RedisObjectCache->get_redis_status() )
			{
				$RedisPage = is_multisite() ? 'settings.php?page=redis-cache' : 'options-general.php?page=redis-cache';
				
				// Flush Redis Cache trough WP Rocket Admin Bar Menu
				$args = array(
					'id'     => 'flush-redis-cache',
					'title'  => __( 'Flush Redis Cache' ) . '',
					'parent' => false,
					'href'  => wp_nonce_url( network_admin_url( add_query_arg( 'action', 'flush-cache', $RedisPage ) ), 'flush-cache' )
				);
					
				$wp_admin_bar->add_node( $args );
				
			} // end REDIS
		}
	} // end add_toolbar_link
}
add_action( 'admin_bar_menu', 'redis_add_toolbar_link', 999 );

@eksiscloud thanks for letting me know the code didn't work with 2.x anymore!

I've updated the code to be compatible with 2.0.x (and it's still compatible with 1.x as well) :)