Sessions Problem

kuzjph

Hi, I'm having problems implementing PHP sessions. This is what I'm trying to do. I have 3 php files A,B and C. File A has a HTML form which will send the field data a,b,c,d to File B. File B contains the following code excerpt:
$a = $POST['a'];
$b = $POST['b'];
$c = $POST['c'];
$d = $POST['d'];

$SESSION['a'] = $a;
$SESSION['b'] = $b;
$SESSION['c'] = $c;
$SESSION['d'] = $d;

File B also contains another HTML form. The design of this form is dependant upon the variable $a. This form will send the field data e and f to File C. I planned on using $SESSION[] to get the values of a,b,c and d in File C but it doesn't work. I tried using $SESSION[] in File B and it works just fine.

Hope that wasn't too confusing.

I have placed the session_start() above all my php files:

<?php
session_start();
header("Cache-control: private");
?>

I have not used session_register() anywhere in my code. My register_globals have been set to off and I'm currently using PHP version 4.3.4

Could someone help me please?

Dvector

If you are having difficulties with $_SESSION[]'s, you could use a hidden form element.

So file A will pass $a, $b, $c, $d to file B.
File B will build the form based upon $a.
In each of those possible forms you can put:

<INPUT TYPE=hidden NAME=a VALUE=$a>
<INPUT TYPE=hidden NAME=b VALUE=$b>
<INPUT TYPE=hidden NAME=c VALUE=$c>
<INPUT TYPE=hidden NAME=d VALUE=$d>

Then build the rest of your form on file B (e and f inputs).
File C will then get:

$_POST['a']
$_POST['b']
$_POST['c']
$_POST['d']
$_POST['e']
$_POST['f']

You dont need sessions this way, or at least you dont have to use those session variables. Hope this helps.

kuzjph

Wow thanks alot....I'm new to html / php and did not know about that hidden command thingy. I'll use that but I really want to use sessions to pass the info. I can't figure out why it won't work. I followed everything on the tutorial:

http://www.phpfreaks.com/tutorials/41/0.php

But when I call $_SESSION['a'] on file C ...all i get is a blank.

rehfeld

i would be suspect file B never gets a value of $_POST['a']

try putting this at the top of your php files when debugging. it will show you all undefined variables

ini_set('display_errors', 1);
error_reporting(E_ALL);

other things:

on file B, echo $_SESSION['foo'] to make sure they have a value before even trying to goto file c.

also, make sure your browser is accepting the session cookie.

kuzjph

File B does get the value of $POST['a'].
This is because when I call $SESSION['a'] in file B, I do get the correct value.

This is the code excerpt in B

$name = $_POST['name'];

$_SESSION['name'] = $name;

echo $_SESSION['name'];

Anyway, I tried out Dvector's solution using INPUT TYPE=hidden. It works and I get the original data from A passed to C .....unfortunately another problem crops up.....🙁 l don't get the full value when I have white spaces. Lets say in A
I have a text field for someone's full name. He types "John Barry". This gets posted to B ..... no problems so far......it still displays "John Barry"....but when I use the INPUT TYPE=hidden and post it to C, I only get "John" ....... help.....I think i'm going insane....

Dvector

put quotes around the value when you echo the input line like this:

echO "<INPUT TYPE=hidden NAME=a VALUE=\"$a\">";