Passing a variable

[Anon]

Ok, i have 3 pages that this variable needs to go on.

It is $f it will go to the secound page just by me echoing. From that page i want to send it to my sql page, which will take that variable $f and insert it into the db.
Well it wont go to the other page.

Any ideas?

Do i use global? If so help me out cuase i can't get that to work.
Thanks
Anthony

[Anon]

I don't really understand what your asking here, but I've used variable-passing in a few different ways:

1. You can pass a variable from page to page by adding '?variable=value&variable2=value2' to the end of the page you're calling. For example, if you have a page where you create your variable $f you can pass it to page2 by going to page2.php?f=value. That variable is now in play for page2, you can also continue to pass in the same way to page 3,4, and so on.

2. If the variable is created using a form, and you call a php script/page to process the form, it is passed as a variable the same way I described above. It becomes a variable in play for the page that is called.

3. If you need to carry one variable over several pages or for a long length of time: set a cookie that holds the variable without you having to code all the extra '?var=val' stuff.

Jeof

[Anon]

Well, i got it to work with the url thing, but how would i add that to the url in a form?

I can't seem to get that part to work.
Thanks
Anthony

[Anon]

Again,
I'm not sure what you mean by "adding it to the url in a form." Do you have a show-source file set up I can see?

In any case, this is how the form will work:

Declare your form by using good 'ole form tag:
I haven't seen much of a difference between POST and GET for the method. I generally go with "GET" if the php code is actually on the displayed page, and "POST" if the php code to execute the program is on its own file and thus calls a new page with the display.
Put the page that holds the code that will use the data from the form. So if I have code that will take the form data and insert it into a DB on a file called "execute_app.php", I would put that in the Action="" attribute:

<FORM METHOD="POST" NAME="name" ACTION="execute_app.php">

From there, just build your form using all the standard elements (Inputs, buttons, etc). The NAME of these elements will be the name of the variable passed from the form. What the user types in or chooses from the form element will become the value for that variable. So an input that looks like:

<INPUT TYPE="TEXT" NAME="firstname" VALUE="">

will create the variable $firstname and value will be what the person types in (or if you pre-set a value, that will the var's value).

Once your all set and done, and the form is used, this is what will happen. The form will call the page in the ACTION="" just as if you created it as a link. Then all the variables & values created from the form elements will be tagged on to the end just like if you manually created the link.

So when you press submit, the Browser would go to the URL in the ACTION with the variables and it would look somethign like this:

http://www.yourdomain.com/execute_app.php?firstname=bob&lastname=smith&city=hereville&state=CA&preference=pizza

Get it?
Jeof

PS- Forms are really versatile things when you empower them with PHP & javascript. If you have a page where you want to confirm the data of the form before inserting it into a DB, you could create your second page just like the first but for all the the values of the form insert this code:
<?php echo $variable_name; ?> so it would like:

<INPUT TYPE="TEXT" NAME="firstname" VALUE="<?php echo $firstname; ?>">

This will take what the user inputted in the first form and display it in the second. They can make changes directly to the data, and then press submit. The form action will start anew with whatever values are in the form elements, and take it from there.