Re: use SESSION variable?
- From: Jerry Stuckle <jstucklex@xxxxxxxxxxxxx>
- Date: Sun, 29 Jun 2008 16:27:21 -0400
Twayne wrote:
Hi,
If ever a newbie wants to know how much he has to learn yet, he only has
to look here<g>!! ANYway:
PHP 5.2.5; XP Pro SP2+, local Apache Server
My actual question is: How do I get a POST variable into a session variable so I can use it in any other page I want to use it in?
Apparently posted variables are only available in the Form page in the file called by Action=, right? But I'd like to use it in other places.
By way of example, if this makes any sense:
I have a form.php that posts data to a-file.php. I would also like to
use that same var dat in files other than a-file.php though.
Since however it's only available to a-file.php because that's where
the form's action= sends it, I logically then cannot get the same
variable for z-file.php, right?
So the logical way to get it accessible for other files then would be to
put it into a session variable, right? HOW the heck do I do that???
In this particular case, to keep it simple, I've been using "age" for
the variable. I want to 'input' "age" in 1.php, and use it in both
2.php and 3.php.
===========
In 1.php I have:
<?php
session_start();
$_SESSION['age'] = $age;
?>
<form method="post" action="2.php"
<input type="text" name="age"
<input type="Submit" value="Continue">
</form>
------------------
Runs OK. Say the entered age was "66".
==========
In 2.php I have:
<?php
session_start(); // needed or $age fails completely.
$age = $_POST['age'];
echo '$age is ' . $age;
echo '<br>$POST is ' . $_POST['age'];
echo '<br>session age is ' . $_SESSION['age'];
echo "<br><br><HR>";
?>
<br>
<a href="3.php">Go to 3.php and run same code</a>
---------------------
Outputs:
$age is 66
$POST is 66
session age is
Go to 3.php and run same code
And throws this warning:
Warning: Unknown: Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively. in Unknown on line 0
I prefer not to mod the .ini; I'd rather know the WHY.
============
and in 3.php I Have:
<?php
session_start();
$age = $_SESSION['age'];
echo '$age is ' . $age;
echo '<br>$POST is ' . $_POST['age'];
echo '<br>session age is ' . $_SESSION['age'];
?>
-----------------------
Clicking the link in 2.php results in this output:
$age is 66
$POST is
session age is 66
BUT there seems to be NO WAY I can find to get "age" properly into a session variable in 2.php.
The code here is the closest I can come to getting it working; which isn't very desirable, especially considering the warning, which is new to me and no amount of research seems to explain it well to me so I can understand WHY it throws that error.
=============
It's doing approximately what I want, but ... it doesn't feel right, and I can't do anything to get rid of that Warning and still keep the code working. Thus, I think I need to get 2.php working correctly.
Any and all relevant comments much appreciated by this newbie,
TIA,
Twayne
You never set $_SESSION['age']. You need something like:
$_SESSION['age'] = $_POST['age'];
Of course, like any user data, you should validate/sanitize it before using it. The most logical place is before you put in the $_SESSION variable.
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@xxxxxxxxxxxxx
==================
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