http://snippets.dzone.com/posts Mon, 06 Oct 2008 07:55:21 GMT DZone Snippets: url code http://snippets.dzone.com/posts/show/187 This function transforms an HTTP request path (ie, $_SERVER['PATH_INFO']) into its canonical form, removing empty path elements and relative path elements (//, /./, /../). It assumes that there is a trailing slash on the path if it's a directory. <br /> <br /><code>function canonical_path($path) { <br /> $canonical = preg_replace('|/\.?(?=/)|','',$path); <br /> while (($collapsed = preg_replace('|/[^/]+/\.\./|','/',$canonical,1)) !== $canonical) { <br /> $canonical = $collapsed; <br /> } <br /> $canonical = preg_replace('|^/\.\./|','/',$canonical); <br /> return $canonical; <br />}</code> Sun, 17 Apr 2005 08:59:47 GMT http://snippets.dzone.com/posts/show/187 adrian (Adrian Sampson)