PHP将session信息存储到数据库的类实例

本文实例讲述了PHP将session信息存储到数据库的类。分享给大家供大家参考。具体分析如下：

SessionHandlerInterface接口是PHP内置的接口，直接实现就行了 具体可以看php手册关于session_set_save_handler函数的解释！

PHP代码如下： 代码如下:_dbLink = $dbLink; $this->_sessionTable = $sessionTable; } /** * 打开 * @access public * @param string $session_save_path 保存session的路径 * @param string $session_name session名 * @return integer */ public function open($session_save_path,$session_name) { $this->_sessionName = $session_name; return 0; } /** * 关闭 * @access public * @return integer */ public function close() { return 0; } /** * 关闭session * @access public * @param string $session_id session ID * @return string */ public function read($session_id) { $query = "SELECT value FROM {$this->_sessionTable} WHERE sid = {$session_id} AND UNIX_TIMESTAMP(expiration) + " . self::SESSION_EXPIRE . " > UNIX_TIMESTAMP(NOW())"; $result = $this->_dbLink->query($query); if(!isset($value) || empty($value)) { $value = ""; return $value; } $this->_dbLink->query("UPDATE {$this->_sessionTable} SET expiration = CURRENT_TIMESTAMP() WHERE sid = {$session_id}"); $value = $result->fetch_array(); $result->free(); return $value['value']; } /** * 写入session * @access public * @param string $session_id session ID * @param string $session_data session data * @return integer */ public function write($session_id,$session_data) { $query = "SELECT value FROM {$this->_sessionTable} WHERE sid = '{$session_id}' AND UNIX_TIMESTAMP(expiration) + " . self::SESSION_EXPIRE . " > UNIX_TIMESTAMP(NOW())"; $result = $this->_dbLink->query($query); $result = $result->fetch_array(); if(!empty($result)) { $result = $this->_dbLink->query("UPDATE {$this->_sessionTable} SET value = {$session_data} WHERE sid = {$session_id}"); } else{ $result = $this->_dbLink->query("INSERT INTO {$this->_sessionTable} (sid,value) VALUES ('{$session_id}','{$session_data}')"); } if($result){ return 0; } else{ return 1; } } /** * 销魂session * @access public * @param string $session_id session ID * @return integer */ public function destroy($session_id) { $result = $this->_dbLink->query("DELETE FROM {$this->_sessionTable} WHERE sid = '{$session_id}'"); if($result){ return 0; } else{ return 1; } } /** * 垃圾回收 * @access public * @param string $maxlifetime session 最长生存时间 * @return integer */ public function gc($maxlifetime) { $result = $this->_dbLink->query("DELETE FROM {$this->_sessionTable} WHERE UNIX_TIMESTAMP(expiration) < UNIX_TIMESTAMP(NOW()) - " . self::SESSION_EXPIRE); if($result){ return 0; } else{ return 1; } } } $dbLink = new mysqli("localhost","root","test"); $sessionTable = "sessioninfo"; $handler = new MySessionHandler($dbLink,$sessionTable); session_set_save_handler($handler); session_start(); $_SESSION['name'] = "test"; echo $_SESSION["name"]; //session_destroy();

希望本文所述对大家的php程序设计有所帮助。

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