I have run into a very interesting problem trying to debug my custom php session handler. For some reason unknown to me I can set cookies all the way through the session handler right up until the very start of the write function.

As far as I know session handler calls go in this order.

open -> read -> write -> close

The open function sets a cookie just fine.

function open($save_path,$session_name)
{
require_once('database.php');
require_once('websiteinfo.php'); mysql_connect($sqllocation,$sql_session_user,$sql_session_pass); @mysql_select_db($sql_default_db); date_default_timezone_set('America/Los_Angeles');
setcookie("test","test"); return TRUE;
}

The read function can set a cookie right up until the very moment it returns a value.

function read($session_id)
{
$time = time();
$query = "SELECT * FROM 'sessions' WHERE 'expires' > '$time'";
$query_result = mysql_query($query);
$data = '';
/* fetch the array and start sifting through it */
while($session_array = mysql_fetch_array($query_result))
{
/* strip the slashes from the session array */
$session_array = $this->strip($session_array);
/* authenticate the user and if so return the session data */
if($this->auth_check($session_array,$session_id))
{
$data = $session_array['data'];
}
}
setcookie("testcookie1","value1",time()+1000,'/');
return $data;
}

The very first line of the write function is setting another cookie and it cannot because the headers are already sent. Any ideas anyone?

Thanks in advance