$newInt = substr_replace($oldInt, $newDigit, $position, 1);
$newValue = (string)$newInt;
echo $newValue;
эхо 000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
(что я хочу!)
mysql_query("UPDATE table SET $fieldVariable = $newValue WHERE userID = '".$_SESSION['userID']."' ")or die("Query failed:".mysql_error());
Показывает запись MySQL
999999999999999999999999999999999999999999999999999
поле mysql установлено varchar (100)