Php session logout and cleanup, phpsession logout _ PHP Tutorial-php Tutorial

In PHP, the SESSION is logged out and cleared, and the phpsession is logged out. In PHP, the SESSION is logged out and cleared. phpsession is logged out. 1. you must enable session_start () on each page before using the session in each page. 2. session_start () initializes the session, cancels and clears the SESSION in PHP, and cancels the phpsession.

1. you must enable session_start () on each page before using session on each page.

2. session_start () initializes the session. during the first access, a unique session ID is generated and saved on the client (saved based on cookies). during the next access, session_start () check whether there is a session ID. if there is a browser that will bring this session ID (this can be seen in ff browser by sending the header file) to determine the client.

3. the session sent to the cookie will save a session ID (session_id) on the client. you can print the cookie to see that the key value of this session_id is session_name,
Session_id () ==$ _ COOKIE [session_name ()]

4. if the cookie is disabled on the client, you must use the url to pass session_id to the SESSION of the URL.

5. when canceling a SESSION, you cannot use unset ($ _ SESSION). you can use $ _ SESSION = array () or $ _ SESSION = null. the correct method for canceling a session is as follows:

// Correct method of canceling a session: // 1 enable sessionsession_start (); // 2. clear the session information $ _ SESSION = array (); // 3. clear the client sessionidif (isset ($ _ COOKIE [session_name ()]) {setCookie (session_name (), '', time ()-3600, '/');} // 4. completely destroy sessionsession_destroy ();

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Session 1. you must enable session_start () on each page before using session on each page. 2. session_start () initializes the session ,...