代码：【复制】 
function SessionVerify() {
	if(!isset($_SESSION['user_agent'])){
		$_SESSION['user_agent'] = md5($_SERVER['REMOTE_ADDR'].$_SERVER['HTTP_USER_AGENT']);
	}

	elseif($_SESSION['user_agent'] != md5($_SERVER['REMOTE_ADDR'].$_SERVER['HTTP_USER_AGENT'])) {
		session_regenerate_id();
	}
}

代码：【复制】 
function SessionDestroy() {
	session_destroy();
	setcookie(session_name(),'',time()-3600);
	$_SESSION = array();
}