Problem getting script to keep variable value

[tickled_pink]

I've encountered what at first glance is a very odd problem. However, I think I may know what the problem is but don't know how to get around it.

I have a script that accesses a database table and allows the user to move between and view each record. So far, two form buttons have been implemented ... Previous and Next (to move to the previous and next records in the database).

One variable within the script was giving me a headache. It simply keeps track of the current record number (it's compared with another variable that keeps track of the total number of records in the table).

The problem was that I could only access the first two records. But I now think I know what the problem is.

I'm using the $PHP_SELF to reload the form after a button is pressed. It now seems to me that this variable, which is created outside the form, is cleared every time I press a button thereby causing the problem I'm experiencing.

Is there a way of passing a variable back to the original script when using $PHP_SELF?

[nemonoman]

I'm assuming you have some sort of form?

in the form echo

<input type=hidden name=valueIwanttokeep value='value'>

In later PHP scripts you might populate this this way

<? if($_POST['valueIwanttokeep']){
$value=$_POST['valueIwanttokeep'];
echo "<input type=hidden name=valueIwanttokeep value=$value>";
?>

[tickled_pink]

Hmmm ... I can't seem to get it to work.

The variable I want to pass back to the script is $appno. So, I take it that I should type in:

<? if($_POST['$appno']){ 
$appno=$_POST['$appno']; 
echo "<input type=hidden name=\"appno\" value=$appno>"; 
?> 

😕

I notice from the example that the '}' is missing. Where should it go?

Does it matter where within the form tags this part of the script goes?

[dalecosp]

Originally posted by tickled_pink
Hmmm ... I can't seem to get it to work.

The variable I want to pass back to the script is $appno. So, I take it that I should type in:

<? if($_POST['$appno']){ 
$appno=$_POST['$appno']; 
echo "<input type=hidden name=\"appno\" value=$appno>"; 
}
?> 

😕

I notice from the example that the '}' is missing. Where should it go?

Does it matter where within the form tags this part of the script goes? [/B]

No, it doesn't, as long as it's after <form> and before the submit button.

I inserted the '}' for you in the quoted code, also ...

HTH,

[tickled_pink]

Unfortunately I still can't get it to work.

Perhaps it'll help if I knew what $_POST actually does.

[dalecosp]

Yes, that would definitely help 🙂

$_POST is a superglobal array that contains all the values submitted inside an HTML form whose method is equal to "POST".

So, if your $appno var is not within the form, it will not be in the $_POST array.

Maybe you should append it to the URL as a $_GET variable instead...

But we'd have to see your script to be sure of any such assertions...

[suntra]

Simply use $REQUEST["appno"] it contains $GET, $POST, $COOKIE, $_FILES.

Also, look carefully to what was written :

... $_POST['$appno'] ...

That is wrong !!!! Should be :

... $_POST['appno'] ...

No dollar sign ($) inside $POST (or $GET, or $REQUEST) unless you refer to a variable containing the name of another variable contained in $POST/GET/REQUEST...

[tickled_pink]

Well, ran a simple test to check at the start of the script whether or not a certain value was received from the previous instance of the script and it seems to work. That means I have a very bizarre bug.

Some more testing required, I think.

[tickled_pink]

On the other hand ...

It seems that it only passes the variable back the first time and only sends back that same value back on subsequent calls.

Strange stuff going on!😕