Description:
------------
hi staff,
  In my programs of  my php5.3,i use function "session_set_save_handler" to set the sessions into database,this function must set the parameters:names of the functions like :(open,close,read,write,destroy,gc) as string.
  when i use the functions :read,write,destroy,gc ,i set a global variable(an instance of object) in them ,but i found it works normally in these functions except in "write";i cann't get the value of the variable,only appears in the "wirte" function.
  i change the version of php to < 5.3 like :4.x ??5.2, the problem above disappears.
  i don't know the reason.can you help me to find it out?

  jjjackie

Reproduce code:
---------------
ini_set('session.save_handler', 'user');
class a{
var $var_a = 'here';
function a(){
}
}
$v = new a();
function open($save_path,$session_name){	return true;}
function close(){	return true;}
function read($id){	return true;}
function write($id,$value){
	global $v;
	echo($v ->var_a);
}
function destroy($id){ return true; }
function gc(){ return true; }
session_set_save_handler('open','close','read','write','destroy','gc');
session_start();

Expected result:
----------------
here

Actual result:
--------------
Notice: Trying to get property of non-object in /home/wwwroot/dgunion/inc/inc.session.php on line 182