rex_string::versionSplit PHP Method

    public static function versionSplit($version)
    {
        return preg_split('/(?<=\\d)(?=[a-z])|(?<=[a-z])(?=\\d)|[ ._-]+/i', $version);
    }

 /**
  * Formats a version string by `sprintf()`.
  *
  * @link http://www.php.net/manual/en/function.sprintf.php
  *
  * @param string $value  Version
  * @param string $format Version format, e.g. "%s.%s"
  *
  * @return string
  */
 public static function version($value, $format)
 {
     return vsprintf($format, rex_string::versionSplit($value));
 }