Session class __destruct problem

PHP
1

Hi, I have a problem with custom Session class.


ob_start();
$session = new SessionClass();

echo "Test output";

In SessionClass


function __destruct() {
session_regenerate_id(true);
session_write_close();
}

but,

Warning: session_regenerate_id() [function.session-regenerate-id]: Cannot regenerate session id - headers already sent

2

Only

echo "Test output";

before


session_regenerate_id(true)
3

As warning said you, check that there is some output before the use session_regenerate_id(true) function.

4

Constructor:


        session_set_save_handler(array(__CLASS__, '_open'),
                                 array(__CLASS__, '_close'),
                                 array(__CLASS__, '_read'),
                                 array(__CLASS__, '_write'),
                                 array(__CLASS__, '_destroy'),
                                 array(__CLASS__, '_gc'));
        session_name($sessionName);
        session_start();

But test file must response json data: echo “Test output”;

5

Oh!

Before __destruct:


ob_flush();



ob_start();
session_start();
echo "Test output"; 
ob_flush(); // Warning: session_regenerate_id() [function.session-regenerate-id]: Cannot regenerate session id - headers already sent
session_regenerate_id(true); 
session_write_close();
6

Solutions: Don’t send any output to the browser before calling the destruct method, or use output buffering.

Whats happening in the constructor?