voku / portable-utf8

   *

   * @return string|false The portion of haystack or false if needle is not found.

   */

  public static function strrchr($haystack, $needle, $part = false, $encoding = 'UTF-8')

  {

    if ($encoding !== 'UTF-8') {

      $encoding = self::normalize_encoding($encoding);

    }

    return \mb_strrchr($haystack, $needle, $part, $encoding);

  }

  /**

   * alias for "UTF8::strstr()"

   *

   * @return string|false <p>The portion of haystack or<br />false if needle is not found.</p>

   */

  public static function strrichr($haystack, $needle, $part = false, $encoding = 'UTF-8')

  {

    if ($encoding !== 'UTF-8') {

      $encoding = self::normalize_encoding($encoding);

    }

    return \mb_strrichr($haystack, $needle, $part, $encoding);

  }

  /**

   * Find position of last occurrence of a case-insensitive string.