Question

It looks like I still haven’t got the grasp on sessions.
Session data will simply not be accessible for included files or stored when page is reloaded.

I have the following code:

page1.php

<?php
/*
Template Name: Some template
*/

  session_start();  
  $_SESSION['start'] = 'start';
  print_r($_SESSION);

  if(some condition)      
    include('include1.php');
  else
    include('include2.php');
?>

include1.php

<?php
  /* Some comments here */

  $_SESSION['test'] = 'Test text';
  print_r($_SESSION);
?>

include2.php

<?php
  /* Some comments here */

  print_r($_SESSION);
?>

Page1 first includes include1.php where I do some stuff. Then I load page1 including include2.php.

The output result of the print_r() is:

Array ( [start] => start ) // From page 1
Array ( [start] => start [test] => Test text )  // From include 1
Array ( [start] => start ) // From include 2

My question is:
1) Why isn’t [include] outputted in page1.php in the first print_r()after reload?
2) Why isnt’ [include]outputted in include2.php?

I only add session_start() in page 1 since the other two files are included. I’ve also tried adding session_start() in both include files, but that doesn’t work either, since it creates new instances.

UPDATE
My “actuall” include code:

  switch($action) {
    case 'a': include_once('include/include1.php'); break;
    case 'b': include_once('include/include2.php'); break;
    //default:  
  }
  print_r($_SESSION); // <- Here all registered session variables are outputed

Answer 1

The code you displayed is working the way it is supposed to:

You initialized sessions – session_start()

You created the first element in the array – start

On the first include, you added an array element to $_SESSION by adding the key test

When you output the first include, it includes both start and test

On the second include, you did not add any array elements to $_SESSION, which is why it outputs only start

The include code you stated only calls in the first page, or the second page, but not both.