How to get plugin_dir_path of a directory in WordPress

Question

I am using the Meta Box plugin from Delux Blog Tips (http://www.deluxeblogtips.com/meta-box/) and need to change the defined constants in the plugin. I need to do this because I am using the plugin inside a plugin and not a theme.

I have placed the plugin inside a folder called "lib/meta-box" which is inside my plugin directory.

Using the WordPress "plugin_dir_path()" function I need to define the path to the above folder.

I have tried this:

define('RWMB_DIR', plugin_dir_path(__FILE__));

but this doesn't include the "lib/meta-box" directory.

The file defining the constant is located in the root of the plugin directory.

Thanks

Answer 1

Have you tried this:

$dir = plugin_dir_path(__FILE__) . 'lib/meta-box';
define('RWMB_DIR', $dir);