Session Passing

playac

Hi I am trying to pass some variables via session, through a couple of pages. I start the session and register the variables but it will not pass them past the second page. What am I doing wrong?

Anon

you are declaring session_start(); at the start of every page aren't you?

blackmamba

Or simply session_register them at the top of every page.

playac

Yes I start it out like this:

<?
Session_start();
Session_register("variable_name");

And the variable values are fiiled in a form and passed via POST.

Anon

I had a similar problem with Windows IE, when passing a variable to a third page, but without sessions, even though I resubmitted the variable in the form, it would just not pass, funny thing is, it did not do it with all the pages that used the same process, I wonder if it had a problem with the value / content of the variable that is sent??

Anon

Does the session page expire, when you click the browser back button too?

Anon

Well - I am not a whizz at all this, but I don't thing you can pass a variable if it is also covered by POST - it just does not pass correctly.

I found that if a tried to pass a variable that is also in a form, it would not pass.

There must be rules about this, but hard to find, in the PHP manual. .

The book I like is PHP and MySQL Web Development by Welling and Thomson. On page 434 he does say:-

"A session variable cannot be overwritten by GET and POST data, which is something to bear in mind when programming."

Not the same thing but I guess it is related to this.

Paulsim

playac

Yes, I have that book, guess I need to sit down and read it, i/o just skimming for answers. I dont cover sessions as extensibly as I would like it to. I guess I could try to do it with out the form, just with a link, I tried it with a test page and it seemed to work. I dont know. I guess it will be trial and error.

Anon

I lost a lot of time on problems like this. I often did not get what I expected.

I don't know what sort of debugging feature you have.

As an editor I use phpide (phpcoder) from www.phpide.de. It should have a debug facility built in but I cannot get it to work; along with many others. However I like the program.

What I do now is stick lines in such as

echo "The value of myvar is ".$myvar."<br>";

all over the place so that I can see what the value of a particular variable is at different parts of the program. I get some nasty surprises. The variable is often not what I thought it should be and that's how I find out what is going wrong.

The examples in that book are also super. You learn lots by studying them, particularly as many of them are actual applications that work.

Cheers and good luck; fascinating language this PHP.

Paul