Passing errors via sessions ??

[PHPycho]

Hello forums !!
As we know information can be passed through pages using Query strings, forms, cookies, sessions.
I would like to know how sessions can be used effectively to pass errors between different pages ?
Thanks in advance to all of you.

[PHPycho]

knock knock

[rowanparker]

Please wait more than a few hours before bumping.

Just use sessions like you would to pass vars between pages:

//Page 1
<?php
session_start();
$_SESSION['error'] = "This is an error.";
?>


//Page 2
<?php
session_start();
echo '$_SESSION[error] = ' . $_SESSION['error'];
?>