01.
<?php
02.
session_start();
03.
$n_bill
= null;
04.
if
(isset(
$_POST
[
'n_bill'
])) {
05.
$n_bill
=
$_POST
[
'n_bill'
];
06.
}
07.
if
(isset(
$_SESSIO
[
'n_bill'
])) {
08.
$n_bill
=
$_SESSION
[
'n_bill'
];
09.
}
10.
11.
12.
13.
if
(
$saved
=== true) {
14.
header(
'Location: start_num.php'
, true, 302);
15.
exit
();
16.
}
17.
18.
19.
?>
20.
<input type=
"hidden"
name=
"n"
value=
"<?=$n_bill;?>"
>