//set garbage collection time out
$garbage_timeout = 14400; // 14400 seconds = 240 minutes = 4 hours
ini_set('session.gc_maxlifetime', $garbage_timeout);
//set new session directory
strstr(strtoupper(substr($_SERVER["OS"], 0, 3)), "WIN") ? 
	$sep = "\\" : $sep = "/";
$sessdir = ini_get('session.save_path').$sep."my_sessions";
if (!is_dir($sessdir)) { mkdir($sessdir, 0777); }
ini_set('session.save_path', $sessdir);