checking to se if a variable is passed from one page to another

[seanpaulcail]

I'm checking to see if a variable is passed from one page to another using sessions.

So on one page I have a get function for a form.

on the next page I want to check if the variable there.

So I wrote a simple code like the following

//if filled out
if ($ship_country)
{echo it's here;}
else{echo it's not here;}

but I keep getting an error message.

I feel like a fool because this should be very simple

thanks.

forever a newbie 😃

[dustbuster]

What does the error message say?
Is the code you posted the code you are using or is it psuedo code?

[seanpaulcail]

I took out the code that was causing the error.
and now I have the following code

<?
 include ('book_sc_fns.php');
// The shopping cart needs sessions, so start one
session_start();
do_html_header("Checkout");
echo ($HTTP_GET_VARS);
do_html_footer();
                                           ?>

But the only answer I get is "Array"

You may step through my site if you would like to see how it works.

http://WWW.CAILLOUETTE.COM/CHAPTER2...cat.php?catid=1

when a book is chosen and the person enters their info (mailing) itis done via a post comman.

Then the next page, "purchase.php" has a mail form.
This form is filled out using a "get" action. Then presss the little "purchase" link to the left named purchase.
This takes you to the next page where I will insert the "$HTTP_GET_VARS" info into
the database. But before I do so I want to view $HTTP_GET_VARSinformation.
so on page "purchase.php "

I have the following code:

<? 
include ('book_sc_fns.php'); 
// The shopping cart needs sessions, so start one 
session_start(); 
do_html_header("Checkout"); 
 echo ($HTTP_GET_VARS); 
do_html_footer(); 
?> 

what I need to do is to view the HTTP_GET_VARS array.

Sorry for the log winded explanation.
Basically I need a script that will display the HTTP_GET_VARS array

thanks

[Digimatt]

Originally posted by seanpaulcail
I have the following code:

<? 
include ('book_sc_fns.php'); 
// The shopping cart needs sessions, so start one 
session_start(); 
do_html_header("Checkout"); 
 echo ($HTTP_GET_VARS); 
do_html_footer(); 
?> 

<?
include ('book_sc_fns.php'); 
// The shopping cart needs sessions, so start one 
session_start(); 
do_html_header("Checkout"); 
foreach ($HTTP_GET_VARS as $value) {
    echo "Value: $value<br>\n";
}
do_html_footer(); 
?> 

[seanpaulcail]

when I view my $HTTP_GET_VARS like this:

echo ($HTTP_POST_VARS);

I get "Array"

why can I not view this array? it is driving me insane!!!
😃

can someone out there please help me????

[Digimatt]

You are trying to use $HTTP_GET_VARS as a variable. IT IS AN ARRAY. You have to step through arrays. You CONNOT just echo them. I and one other person have provided the code to step through the array using a foreach loop. I don't know if you are reading the posts or not.

try this for starters:

echo $HTTP_GET_VARS[0];

Then if you want to, you can use the code provided in previous posts and step through each key in the array and display its value. It's not that hard. Another thing you may consider is to use the variable name directly.

<form ... method=get ...>
<input type=text name=foo value=bar>
<input ...submit... >
</form>

<?
echo "Foo: $foo";
?>

[seanpaulcail]

the more I try the more I am convinced that there is nothing in the $HTTP_GET_VARS array because nothing is showing up.

go ahead and step through my web site

http://WWW.CAILLOUETTE.COM/CHAPTER25d/show_cat.php?catid=1

select a book, choose add to basket, then fill out the info filed, with anything (a,a,a,a,a,a,a) will be enough, then the next page uses "get" to retrieve info from a ups server.
Then click the small purchase link (bottom left) to go to next page. On this page I will have the credit card ifno, but first I need to process the $HTTP_GET_VARS info (by inserting it into the database) I just want to make sure it's there.

after pressing the small purchase link brining you to purchase.php you can see nothing is showing up.

The current code on purchase.php is:

<?
 include ('book_sc_fns.php'); 
// The shopping cart needs sessions, so start one 
session_start(); 
do_html_header("Checkout"); 

foreach ($HTTP_GET_VARS as $value) {
echo "Value: $value<br>\n"; }

echo $HTTP_GET_VARS[0]; 

do_html_footer(); 
 ?> 

but I get nothing from this code. So the problem must be that $HTTP_GET_VARS is empty.

so my question is, how do I get the variable from the purchase1.php page to the purchase.php page?

I appreciate all the help but I think the problem is with purchase1.php and the get command. I can post that code if you would like to see it, just let me know if you're still willing to help.

Thank you thank you thank you😃

[Digimatt]

I really don't have time to debug your code for you, but I would pretty much guess it has to do with the javascript.

Walk through your code and remember that PHP will execute on the sever and javascript on the client. If your PHP is actually writing javascript for you, you have to keep a close eye on your logic. 'a' will happen on the server...THEN 'b' will happen in the browser.

You have an onClick that takes to to a popup for UPS. Is your script waiting for UPS before it continues? If so, does UPS accept your query string and pass it through to a reply script? You don't have an action on your form, just an onClick action in your button tag. This means you are not passing any data to PHP anywhere. How are you thinking those variables are going to be passed back to your script?

You're not only deal with broken logic in your script, but you are making a lot of assumptions about UPS. Did you build your cart from scratch or are you hacking someone elses code. If you are using someone elses code, you are assuming they knew what they were doing. If you are using your own code, I would write a small test script thatdoes specifically what you want to do. Like, passing a variable to a php script. Then write something that allows you to watch the data flow through UPS. Then combine the two, make sure they work together, then integrate what you've learned into the larger script. In your cart, there arre tooo many outside factors to find your problem within that script. Keep it simple and figure it out on a smaller scale first. I've done similar things to what you are doing. I had to pass shopping cart data to a third party affiliate script and back. The safe way to do that is to submit your data to a PHP script on your server then use something like 'http_post' to pass only required data to the third party and do a look up when the response comes from the third party. I'm not sure how UPS does it, but you have a lot of different parties and technologies all trying to work together.

It will feel pretty good when you get it all working.

Good luck.

[keith73]

The only way something will show up in HTTP_GET_VARS is if you actually pass information via the GET method. This usually means a form that uses GET as the method instead of POST, or a query string appended to the URL in the form of:
http://www.thissite.com?key1=value1&key2=value2

Now if using a form and the GET method, the form has to actually be submitted. You can't just populate the form with data and leave it at that.

and here is another code snippet to check the value of any of the global arrays. this one actually shows you key/value pairs.

//change $_POST to $_GET or $_SESSION or $ENV, etc. whichever array you need to view.
echo "Values submitted via POST method:<br>";
reset ($_POST);
while (list ($key, $val) = each ($_POST)) {
	echo "$key => $val<br>";
}

• keith