Wordpress get plugin directory

Question

Is there any function that would return the full path of my plugin in WordPress?

Example is

path/wp-contents/plugins/myplugin

I have tr

Answer 1

Unfortunately, most of the answers here seem to forget about one important thing.

In addition to the plugins dir, plugins might be also in the Must-use plugins (mu-plugins) directory

Because of that, we need to check multiple directories.
An example function to do this:

function get_plugin_dir_path($pluginFolderName){

    if ( defined( 'WPMU_PLUGIN_DIR' ) && file_exists( trailingslashit( WPMU_PLUGIN_DIR ) . $pluginFolderName ) ) {
        return trailingslashit( WPMU_PLUGIN_DIR ) . $pluginFolderName;
    } elseif ( defined( 'WP_PLUGIN_DIR' ) && file_exists( trailingslashit( WP_PLUGIN_DIR ) . $pluginFolderName ) ) {
        return trailingslashit( WP_PLUGIN_DIR ) . $pluginFolderName;
    }
    return false;

}