111  * @param string $uri
114 function normalize($uri) {  argument
116     $parts = parse($uri);
178  * @param string $uri
181 function parse($uri) {  argument
188     $uri = preg_replace_callback(
193         $uri
196     $result = parse_url($uri);
198         $result = _parse_fallback($uri);
223     $uri = '';
238         $uri = $parts['scheme'] . ':';
243         $uri .= '//' . $authority;
248         $uri .= $parts['path'];
251         $uri .= '?' . $parts['query'];
254         $uri .= '#' . $parts['fragment'];
257     return $uri;
299  * @param string $uri
302 function _parse_fallback($uri) {  argument
309     $uri = preg_replace_callback(
314         $uri
327     if (preg_match('% ^([A-Za-z][A-Za-z0-9+-\.]+): %x', $uri, $matches)) {
331         $uri = substr($uri, strlen($result['scheme']) + 1);
336     if (strpos($uri, '#') !== false) {
337         list($uri, $result['fragment']) = explode('#', $uri, 2);
340     if (strpos($uri, '?') !== false) {
341         list($uri, $result['query']) = explode('?', $uri, 2);
344     if (substr($uri, 0, 3) === '///') {
347       $result['path'] = substr($uri, 2);
349     } elseif (substr($uri, 0, 2) === '//') {
360         if (!preg_match($regex, $uri, $matches)) {
369         $result['path'] = $uri;