Question

$newInt = substr_replace($oldInt, $newDigit, $position, 1);
             $newValue = (string)$newInt;
            echo $newValue;

echoes 0000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
(what i want!)

mysql_query("UPDATE table SET $fieldVariable = $newValue WHERE userID  = '".$_SESSION['userID']."' ")or die("Query failed:".mysql_error());

mysql record shows
999999999999999999999999999999999999999999999999999

mysql field is set varchar (100)

Answer 1

add quotes around $newValue, since it is a VARCHAR field

mysql_query("UPDATE table SET $fieldVariable = '$newValue' WHERE userID  = '".$_SESSION['userID']."' ")or die("Query failed:".mysql_error());