note 48241 deleted from function.realpath by danbrown

Note Submitter: carlosreche at yahoo dot com ---- In my last function, it will always discard "../" if there are no more parent dirs to go back. But it's a mistake! For example, relative paths like "../../downloads" returns "downloads/", and it should return exactly the same entry (because parent directories for "downloads" may exist in this case). Well, I've corrected this bug. Now: "C:/downloads/../../../" returns "C:/" "downloads/../../../" returns "../../" <?php function real_path($path) { if ($path == "") { return false; } $path = trim(preg_replace("/\\\\/", "/", (string)$path)); if (!preg_match("/(\.\w{1,4})$/", $path) && !preg_match("/\?[^\\/]+$/", $path) && !preg_match("/\\/$/", $path)) { $path .= '/'; } $pattern = "/^(\\/|\w:\\/|https?:\\/\\/[^\\/]+\\/)?(.*)$/i"; preg_match_all($pattern, $path, $matches, PREG_SET_ORDER); $path_tok_1 = $matches[0][1]; $path_tok_2 = $matches[0][2]; $path_tok_2 = preg_replace( array("/^\\/+/", "/\\/+/"), array("", "/"), $path_tok_2); $path_parts = explode("/", $path_tok_2); $real_path_parts = array(); for ($i = 0, $real_path_parts = array(); $i < count($path_parts); $i++) { if ($path_parts[$i] == '.') { continue; } else if ($path_parts[$i] == '..') { if ( (isset($real_path_parts[0]) && $real_path_parts[0] != '..') || ($path_tok_1 != "") ) { array_pop($real_path_parts); continue; } } array_push($real_path_parts, $path_parts[$i]); } return $path_tok_1 . implode('/', $real_path_parts); } ?>