SessionHandlerInterface::close

Function name: SessionHandlerInterface::close()

Applicable version: PHP 5 >= 5.4.0, PHP 7

Function description: The close() method is called at the end of the session and is used to close the session's storage. This method is called when the session is explicitly closed or the script is executed.

Usage example:

 <?php class MySessionHandler implements SessionHandlerInterface { public function open($savePath, $sessionName) { // 连接到会话存储，准备会话的读写操作// 返回true 表示成功，否则返回false return true; } public function close() { // 关闭会话存储连接或进行其他关闭操作// 无需返回值} public function read($sessionId) { // 从会话存储中读取指定会话ID 的数据// 返回会话数据的字符串形式} public function write($sessionId, $sessionData) { // 将指定会话ID 的数据写入会话存储// 无需返回值} public function destroy($sessionId) { // 销毁指定会话ID 的数据// 无需返回值} public function gc($maxLifetime) { // 清理过期的会话数据// 无需返回值} } // 注册自定义会话处理器$handler = new MySessionHandler(); session_set_save_handler($handler, true); // 打开会话session_start(); // 进行其他会话操作// 关闭会话session_write_close();

In the example above, we customize a class MySessionHandler that implements the SessionHandlerInterface interface. In the close() method, we can close the connection to the session store or perform other close operations. When using a custom session processor, we need to register it as a session processor through the session_set_save_handler() function.

Note: After calling the close() method, the session data will no longer be modified, so writing operations on the session data in this method should be avoided. If you need to modify the session data, it should be done in the write() method.