function format_au_number($num){ $num = preg_replace("/[^0-9]/", "", $num); // jo 61 thi start thay to 0 ma convert karo if(substr($num, 0, 2) == "61"){ $num = "0" . substr($num, 2); } // jo already 04 hoy to same rakhvo if(substr($num, 0, 2) != "04"){ $num = "04" . substr($num, -8); } return $num; }