To remember which file is for which user, php will also set a cookie on the user's browser that holds this session file id so in their next visit php will read this file and reload the session. Now php by default clears sessions every interval, and also naming convention of session mak...
简而言之，session其实也是cookie，只不过存活时间比较短，但是相较于cookie直接使用更安全，客户端只保存一个sessionid的cookie值，其他内容保存在服务器上，用户浏览时通过sessionid读取session的内容。Cookie是完全保存在客户端的内容，存活时间可以自行设置，用户可以手动删除。网站会员登录的话，如果希望可以...
Session 变量保存的信息是单一用户的,并且可供应用程序中的所有页面使用 Session 的工作机制是:为每个访问者创建一个唯一的 id (UID),并基于这个 UID 来存储变量。UID 存储在 cookie 中,亦或通过 URL 进行传导。 1. 开始 PHP Session 在您把用户信息存储到 PHP session 中之前,首先必须启动会话。 session_start...
需要注意的就是php.ini的时区prc则用后则,否者前者。笔者曾经试过在时区是prc的情况下用了前者,导致time()-strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) <0永远成立,因为是负值。 注意:当请求页面有session_start()的时候,则不管是否有expires、cache-control、last-modified设置,则返回给客户端Cache-Control...
，把手册的例子运行就知道你哪错了，，第二个错误提示是你要session_start之前有内容输出了，即使是一...
PHP 之cookies and session 1.http协议 http(超文本传输协议)是一个基于请求与响应模式的,无状态的,应用层的协议 请求部分: 请求行,消息报头,请求正文 响应部分: 状态行,消息报头,响应正文 2.cookies 运行流程 (1)客户端在浏览器的地址栏中键入Web服务器的URL,浏览器发送读取网页的请求...
php // Creating a custom session ID session_name("MYAPPSESSID"); session_start(); Storing Session Data in Cookies In some cases, it may be desirable to store session data directly in cookies instead of server-side storage mechanisms like file-based or database-based sessions. This approach...
From PHP Session Management basics: Proper use of session.use_only_cookies and session_regenerate_id() can cause personal DoS with undeletable cookies set by attackers. In this case, developers may invite users to remove cookies and advise them they may be affected by ...
generated by applications based on the PHP language. This is a general purpose identifier used to maintain user session variables. It is normally a random generated number, how it is used can be specific to the site, but a good example is maintaining a logged-in status for a user between ...
PHPSESSID Barbour This is a cookie generated by applications based on the PHP language. This is a general purpose identifier used to maintain visitor session variables. It is a random generated number, and is used to maintain a logged-in status and other session based information as a visitor...