private function formatD(&$str) {
    if (strstr($str, '%D'))
      $str = str_replace('%D', $this->dayName(false), $str);
  }
private function formatD(&$str) {
    if (strstr($str, '%D'))
      $str = str_replace('%D', $this->dayName(false), $str);
  }
private function formatD ( & $ str ) { if ( strstr ( $ str , '%D' ) ) $ str = str_replace ( '%D' , $ this -> dayName ( false ) , $ str ) ; }
Textual representation of a day, three letters
@param string $str
Textual representation of a day three letters