/* 禁用cookie和session时,使用 ETag 保存会话信息 $session = isset($_SERVER['HTTP_IF_NONE_MATCH']) ? unserialize(base64_decode($_SERVER['HTTP_IF_NONE_MATCH'])) : array('counter'=>0); $session['counter']++; header('ETag: '.base64_encode(serialize($session))); echo $session['counter']; */ // 客户端禁用cookie时,使用 ETag 保存 session_id ini_set('session.use_cookies', 0); if(isset($_SERVER['HTTP_IF_NONE_MATCH'])){ $session_id = $_SERVER['HTTP_IF_NONE_MATCH']; session_id($session_id); session_start(); }else{ session_start(); $session_id = session_id(); } if(phpversion() >= 5.3){ header_remove('Cache-Control'); }else{ header('Cache-Control:'); } header('ETag: '.$session_id); $_SESSION['counter'] = isset($_SESSION['counter']) ? $_SESSION['counter']+1 : 1; echo $_SESSION['counter'];