Function to call at other page

[jamhussain]

<?php
session_start();

// For radio buttons to get the value from Form.
if (isset($_POST['submit'], $_POST['type']))
{
$type = $_POST['type'];
$_SESSION['a'][0] = (int)$type;
if( !empty( $_SESSION['a'][0] ) )
{
$b = $_SESSION['a'][0];

}


}
?>

it is the code that I use for getting the values from Radio buttons.
But I want to use the Class . I want to use the Function in this class.
so that value of Variable $b can be called at any page.
I want to use $b for further calculations at other pages also.
so what is its solution.
i think, is its solution Classes and functions.
If yes, then how can be code of this function and class.
thanks

[NogDog]

Well, it's already in $_SESSION as $_SESSION['a'][0], so you could just use that; or save it as a separate session variable if you prefer, e.g. $_SESSION['b'].

[jamhussain]

Actually, I get the value

$b = $_SESSION['a'][0];

$c=$b*4;
Now I use this $C valuefor further calcualtions and I use it for Graphs
i e graph.php
but this $c is not accessable at graph.php page.
how can I access it.thanks.

[NogDog]

Like I said, save it as a session variable in $_SESSION (and don't forget to do a session_start() on each page where you need to read/write to the $_SESSION array).