--TEST-- Test dirname() function : usage variations --SKIPIF-- --FILE-- Done --EXPECTF-- Warning: dirname(): Invalid argument, levels must be >= 1 in %sdirname_multi_win.php on line %d NULL string(8) "/foo/bar" string(4) "/foo" string(1) "\" string(1) "\" string(1) "\" string(3) "g:\" string(3) "g:." Done