voku / portable-utf8

      return \iconv_strpos($haystack, $needle, $offset > 0 ? $offset : 0, $encoding);

    }

    if (self::$support['intl'] === true) {

      $returnTmp = \grapheme_strpos($haystack, $needle, $offset);

      if ($returnTmp !== false) {

        return $returnTmp;

      }

    }

    // fallback via vanilla php

      return \mb_strripos($haystack, $needle, $offset, $encoding);

    }

    if (self::$support['intl'] === true) {

      $returnTmp = \grapheme_strripos($haystack, $needle, $offset);

      if ($returnTmp !== false) {

        return $returnTmp;

      }

    }

    // fallback via vanilla php

      trigger_error('UTF8::strrpos() without mbstring cannot handle "' . $encoding . '" encoding', E_USER_WARNING);

    }

    if (self::$support['mbstring'] === true) {

      $returnTmp = \mb_strrpos($haystack, $needle, $offset, $encoding);

      if ($returnTmp !== false) {

        return $returnTmp;

      }

    }

    if (self::$support['intl'] === true) {

      $returnTmp = \grapheme_strrpos($haystack, $needle, $offset);

      }

    }

    if (self::$support['intl'] === true) {

      $returnTmp = \grapheme_strrpos($haystack, $needle, $offset);

      if ($returnTmp !== false) {

        return $returnTmp;

      }

    }

    // fallback via vanilla php