static function difference($path_origin, $path_destiny)
{
if ($path_destiny && $path_destiny[0] == "/") {
return $path_destiny . (substr($path_destiny, -1) == '/' ? '' : '/');
}
$res = array();
$actual = getcwd();
$plain_origin = Paths::__resolve($actual, $path_origin);
$plain_destiny = Paths::__resolve($actual, $path_destiny);
$sames = array();
for ($i = 0; isset($plain_origin[$i]) && isset($plain_destiny[$i]); $i++) {
if ($plain_origin[$i] != $plain_destiny[$i]) {
break;
}
array_push($sames, $plain_origin[$i]);
}
// $i == count($same)
for ($j = count($plain_origin); $j > $i; $j--) {
$res[] = '..';
}
for (; $j < count($plain_destiny); $j++) {
$res[] = $plain_destiny[$j];
}
return implode('/', $res) . '/';
}