URL in custom BBCode

[mad@Max]

Ok, this example

<hookname>bbcode_create</hookname>
<phpcode><![CDATA[if (!function_exists('handle_bbcode_custom'))
{
    function handle_bbcode_custom(&$parser, $code, $options)
    {
        $code = 'code';
        return $code;
    }
}]]></phpcode>
<hookname>bbcode_fetch_tags</hookname>
<phpcode><![CDATA[$tag_list['no_option']['custom'] = array(
	'callback' => 'handle_external',
	'external_callback' => 'handle_bbcode_custom',
	'strip_empty' => true
);
$tag_list['option']['custom'] = array(
	'callback' => 'handle_external',
	'external_callback' => 'handle_bbcode_custom',
	'strip_empty' => true
);]]></phpcode>

This is are template of creating custom bbcode? I'm a right?