url.php

<?php

class url {

    protected $_static_extensions = array('ico','jpg','gif','bmp','png','js','css');

    /**
	 * Fetches an absolute site URL based on a URI segment.
	 *
	 * @param   string  site URI to convert
	 * @param   string  non-default protocol
	 * @return  string
	 */
	public static function site($uri = '', $protocol = FALSE)
	{
		if ($path = trim(parse_url($uri, PHP_URL_PATH), '/'))
		{
			$extension = pathinfo($path, PATHINFO_EXTENSION);
			
			if ( ! in_array($extension, url::$_static_extensions))
			{
				// Add path suffix
				$path .= Kohana::config('core.url_suffix');
			}
		}

		if ($query = parse_url($uri, PHP_URL_QUERY))
		{
			// ?query=string
			$query = '?'.$query;
		}

		if ($fragment = parse_url($uri, PHP_URL_FRAGMENT))
		{
			// #fragment
			$fragment =  '#'.$fragment;
		}

		// Concat the URL
		return url::base(TRUE, $protocol).$path.$query.$fragment;
	}