function file_uri_normalize_dot_segments

Normalize dot segments in a URI.

Parameters

$uri: A stream, referenced as "scheme://target".

Return value

string The URI with dot segments removed and slashes as directory separator.

Related topics

File

includes/file.inc, line 2749

Code

function file_uri_normalize_dot_segments($uri) {
    $scheme = file_uri_scheme($uri);
    if (file_stream_wrapper_valid_scheme($scheme)) {
        $target = file_uri_target($uri);
        if ($target !== FALSE) {
            if (!in_array($scheme, variable_get('file_sa_core_2023_005_schemes', array()))) {
                $class = file_stream_wrapper_get_class($scheme);
                $is_local = is_subclass_of($class, 'DrupalLocalStreamWrapper');
                if ($is_local) {
                    $target = str_replace(DIRECTORY_SEPARATOR, '/', $target);
                }
                $parts = explode('/', $target);
                $normalized_parts = array();
                while ($parts) {
                    $part = array_shift($parts);
                    if ($part === '' || $part === '.') {
                        continue;
                    }
                    elseif ($part === '..' && $is_local && $normalized_parts === array()) {
                        $normalized_parts[] = $part;
                        break;
                    }
                    elseif ($part === '..') {
                        array_pop($normalized_parts);
                    }
                    else {
                        $normalized_parts[] = $part;
                    }
                }
                $target = implode('/', array_merge($normalized_parts, $parts));
            }
            $uri = $scheme . '://' . $target;
        }
    }
    return $uri;
}