Two lines of PHP code which will save your sessions

So you develop PHP applications and use sessions to move data from page to page. You may then also have the problem that session data is not retained, especially if you use a line of code like this:
header('Location:nextpage.php');
Or indeed if the session is not saved on a page refresh.
Enter these 2 lines:

session_regenerate_id(true);
session_write_close();
Put these at the end of your page to save the session data. Also if you use the header function above do something like this.

session_regenerate_id(true);
header('Location:nextpage.php');
session_write_close();