


Xnova (ogame) source code interpretation for PHP web game learning (4)_PHP tutorial
5. User login (login.php)
At the beginning, we said that the entrance to the game is the index.php file; now that we have installed it, we naturally turn to the login process and start watching.
As usual, the previous section is a piece of code that we have introduced in advance, so we will not go into details; the difference is that the language file used is login.mo, and there is a LOGIN constant. As follows
define('INSIDE' , true); define('INSTALL' , false); define('LOGIN' , true); $InLogin = true; $xnova_root_path = './'; include($xnova_root_path . 'extension.inc'); include($xnova_root_path . 'common.' . $phpEx); includeLang('login');
Next is the structure we talked about before. The branch we entered for the first time is the following code:
$parse = $lang; $Count = doquery('SELECT COUNT(*) as `players` FROM {{table}} WHERE 1', 'users', true); $LastPlayer = doquery('SELECT `username` FROM {{table}} ORDER BY `register_time` DESC', 'users', true); $parse['last_user'] = $LastPlayer['username']; $PlayersOnline = doquery("SELECT COUNT(DISTINCT(id)) as `onlinenow` FROM {{table}} WHERE `onlinetime` > '" . (time()-900) ."';", 'users', true); $parse['online_users'] = $PlayersOnline['onlinenow']; $parse['users_amount'] = $Count['players']; $parse['servername'] = $game_config['game_name']; $parse['forum_url'] = $game_config['forum_url']; $parse['PasswordLost'] = $lang['PasswordLost']; $page = parsetemplate(gettemplate('login_body'), $parse); // Test pour prendre le nombre total de joueur et le nombre de joueurs connect閟 if ($_GET['ucount'] == 1) { $page = $PlayersOnline['onlinenow']."/".$Count['players']; die ( $page ); } else { display($page, $lang['Login']); }
Mainly to obtain the number of registered users, the last registered users, and the current number of online users; and display the login welcome page, including the user data obtained previously.
Okay, now the user can choose to register and go to the previous chapter process, or enter the username and password to go to the login process.
1. First obtain the user’s record from the database based on the entered user
2. If there is a record, use md5 to determine whether the user’s password is correct
3. If the password is correct, check whether the user has selected the remember password function, which will be used later
4. include database configuration file config
5. Setcookie, which contains username, password, etc.
6. Redirect to frames.php file
If the first few judgments are correct, some error messages will appear and the login process will end. The message() function prompt will be used, as mentioned before.

PHPsessionstrackuserdataacrossmultiplepagerequestsusingauniqueIDstoredinacookie.Here'showtomanagethemeffectively:1)Startasessionwithsession_start()andstoredatain$_SESSION.2)RegeneratethesessionIDafterloginwithsession_regenerate_id(true)topreventsessi

In PHP, iterating through session data can be achieved through the following steps: 1. Start the session using session_start(). 2. Iterate through foreach loop through all key-value pairs in the $_SESSION array. 3. When processing complex data structures, use is_array() or is_object() functions and use print_r() to output detailed information. 4. When optimizing traversal, paging can be used to avoid processing large amounts of data at one time. This will help you manage and use PHP session data more efficiently in your actual project.

The session realizes user authentication through the server-side state management mechanism. 1) Session creation and generation of unique IDs, 2) IDs are passed through cookies, 3) Server stores and accesses session data through IDs, 4) User authentication and status management are realized, improving application security and user experience.

Tostoreauser'snameinaPHPsession,startthesessionwithsession_start(),thenassignthenameto$_SESSION['username'].1)Usesession_start()toinitializethesession.2)Assigntheuser'snameto$_SESSION['username'].Thisallowsyoutoaccessthenameacrossmultiplepages,enhanc

Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.


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