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How does one pass a PHP variable stored on one page that is NOT in a form, go to another page where a function uses it?

The reason I need this is so a user can adjust their form they are using by adding more rows with a submit button.

This is what I want to achieve:

  • $maxrows = stores the total amount of rows currently on the page

  • user presses "add more rows button"

  • another page is loaded which has a function which adds $maxrows + 5

  • once complete, the page redirects to the form

  • the form redisplays the page with 5 more rows

Any ideas how this can be implemented?

Thanks

Preferably not in a session if possible!

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  • Thanks - im using a framework and the session class I built is purely for login. Im too scared to put any other data into the session that is not needed. Commented Jul 2, 2011 at 17:07
  • Give it a prefix then so you have no chance of conflicts. Something like $_SESSION["my_max_rows"] = 13; will be safe. If you don't want to change the name on your pages you can just assign it back out. $max_rows = $_SESSION["my_max_rows"]; Commented Jul 2, 2011 at 17:15
  • Thanks im just creating a new session class like you said which will deal with form customization. :) Commented Jul 2, 2011 at 17:18
  • Don't forget to accept an answer if one helped you. Commented Jul 3, 2011 at 16:58

5 Answers 5

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3

I would use sessions.

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2

you can use jQuery + ajax to achieve this. Here when you click on add more rows it will add up just dome elements with dynamic names. The concept can be understood from http://charlie.griefer.com/blog/2009/09/17/jquery-dynamically-adding-form-elements/

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jQuery would be good in this case. Much cleaner then jumping around pages to change the look of a form.
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Use it with GET parameters - include the variable in the URL that loads your new page like 

http://example.com/file.php?maxrows=10

In file.php you get it by using $_GET instead of $_POST

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4 Comments

Its just a variable in my php code its not set by an input box or any form. How do I get it then? Thanks
you said ---another page is loaded which has a function which adds $maxrows + 5 - the URL for this page could be generated with the parameter in the end - or, as Drazisil said - you could use sessions
How do I generate the url with my variable at the end then? Thanks I tried googling $_get but nothing relates to my situation when im trying to pass a global variable to another page. Thanks
Anything with a querystring becomes a $_GET page.php?a=moo becomes $_GET['moo'].
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You could use $_GET instead of $_POST.

You pass the variable in to the page via the url:

someurl.com/page.php?somevar=hello

Then in page.php you can use $_GET['somevar'] which will equal "hello".

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1

Try using a session.

Put start_session(); at the beginning of your script.

You can store the number of rows in $_SESSION['max_rows'].

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