ref.session.php

SESSION函数的详细介绍

session_abort — Discard session array changes and finish sessionsession_cache_expire — 返回当前缓存的到期时间session_cache_limiter — 读取/设置缓存限制器session_commit — session_write_close 的别名session_decode — 解码会话数据session_destroy — 销毁一个会话中的全部数据session_encode — 将当前会话数据编码为一个字符串session_get_cookie_params — 获取会话 cookie 参数session_id — 获取/设置当前会话 IDsession_is_registered — 检查变量是否在会话中已经注册session_module_name — 获取/设置会话模块名称session_name — 读取/设置会话名称session_regenerate_id — 使用新生成的会话 ID 更新现有会话 IDsession_register_shutdown — 关闭会话session_register — Register one or more global variables with the current sessionsession_reset — Re-initialize session array with original valuessession_save_path — 读取/设置当前会话的保存路径session_set_cookie_params — 设置会话 cookie 参数session_set_save_handler — 设置用户自定义会话存储函数session_start — 启动新会话或者重用现有会话session_status — Returns the current session statussession_unregister — Unregister a global variable from the current sessionsession_unset — Free all session variablessession_write_close — Write session data and end session

a example of php session

simple session test <?php /* [EDIT by danbrown AT php DOT net:    The author of this note named this    file tmp.php in his/her tests. If    you save it as a different name,    simply update the links at the    bottom to reflect the change.] */ session_start(); $sessPath   = ini_get('session.save_path'); $sessCookie = ini_get('session.cookie_path'); $sessName   = ini_get('session.name'); $sessVar    = 'foo'; echo '<br>sessPath: ' . $sessPath; echo '<br>sessCookie: ' . $sessCookie; echo '<hr>'; if( !isset( $_GET['p'] ) ){     // instantiate new session var     $_SESSION[$sessVar] = 'hello world'; }else{     if( $_GET['p'] == 1 ){         // printing session value and global cookie PHPSESSID         echo $sessVar . ': ';         if( isset( $_SESSION[$sessVar] ) ){             echo $_SESSION[$sessVar];         }else{             echo '[not exists]';         }         echo '<br>' . $sessName . ': ';         if( isset( $_COOKIE[$sessName] ) ){         echo $_COOKIE[$sessName];         }else{             if( isset( $_REQUEST[$sessName] ) ){             echo $_REQUEST[$sessName];             }else{                 if( isset( $_SERVER['HTTP_COOKIE'] ) ){                 echo $_SERVER['HTTP_COOKIE'];                 }else{                 echo 'problem, check your PHP settings';                 }             }         }     }else{         // destroy session by unset() function         unset( $_SESSION[$sessVar] );         // check if was destroyed         if( !isset( $_SESSION[$sessVar] ) ){             echo '<br>';             echo $sessName . ' was "unseted"';         }else{             echo '<br>';             echo $sessName . ' was not "unseted"';         }     } } ?> <hr> <a href=tmp.php?p=1>test 1 (printing session value)</a> <br> <a href=tmp.php?p=2>test 2 (kill session)</a>/*----------------------------------------------华丽分割线----------------------*/<?phpfunction getSessionData ($session_name = 'PHPSESSID', $session_save_handler = 'files') {    $session_data = array();    # did we get told what the old session id was? we can't continue it without that info    if (array_key_exists($session_name, $_COOKIE)) {        # save current session id        $session_id = $_COOKIE[$session_name];        $old_session_id = session_id();        # write and close current session        session_write_close();        # grab old save handler, and switch to files        $old_session_save_handler = ini_get('session.save_handler');        ini_set('session.save_handler', $session_save_handler);        # now we can switch the session over, capturing the old session name        $old_session_name = session_name($session_name);        session_id($session_id);        session_start();        # get the desired session data        $session_data = $_SESSION;        # close this session, switch back to the original handler, then restart the old session        session_write_close();        ini_set('session.save_handler', $old_session_save_handler);        session_name($old_session_name);        session_id($old_session_id);        session_start();    }    # now return the data we just retrieved    return $session_data;}?>