Php session logout and cleanup _ PHP Tutorial

Logout and cleanup of sessions in PHP. In PHP, the SESSION is logged out and cleared. 1. you must enable session_start () on each page before using the session in each page. 2. session_start () initializes the session. The first access will generate the logout and clearing of the SESSION in PHP.

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:

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// The correct method for canceling a session is as follows: // 1 enable session Session_start (); // 2. clear the session information $ _ SESSION = array (); // 3. clear the sessionid of the client If (isset ($ _ COOKIE [session_name ()]) { SetCookie (session_name (), '', time ()-3600 ,'/'); } // 4. completely destroy the session Session_destroy ();

Session 1. you must enable session_start () on each page before using session on each page. 2. session_start () initializes the session. The first access will generate...