Hacing issue with Developing plug in.

I keep getting this error:

Parse error: syntax error, unexpected T_FUNCTION, expecting ‘)’ in /home/public_html/.com/wp-content/plugins/property/lib/jw_custom_posts.php on line 119

and my code looks like this:

// At WordPress' init, register the taxonomy
        $this->init(
            function() use($taxonomy_name, $plural, $post_type_name, $options)
            {
                // Override defaults with user provided options

                $options = array_merge(
                    array(
                         "hierarchical" => true,
                         "label" => $taxonomy_name,
                         "singular_label" => $plural,
                         "show_ui" => true,
                         "query_var" => true,
                         "rewrite" => array("slug" => strtolower($taxonomy_name))
                    ),
                    $options
                );

                // name of taxonomy, associated post type, options
                register_taxonomy(strtolower($taxonomy_name), $post_type_name, $options);
            });
    }