数据库储存session信息代码

今天给大家上一段代码，数据库存储session信息，你只需要将下面这段代码放到session文件中，然后再session_start()的地方引入sessiong文件就行啦，当然你就不用再写session_start()啦

这是数据库表的结构

好，下面上代码啦

class session {
private static $_mysqli;

public static function action() {
ini_set('session.save_handler','user');
session_set_save_handler(array(__CLASS__,'open'),
array(__CLASS__,'close'),
array(__CLASS__,'read'),
array(__CLASS__,'write'),
array(__CLASS__,'destroy'),
array(__CLASS__,'gc'));
@session_start();
}

public static function open($path,$name) {
self::$_mysqli = new mysqli('localhost','root','','test');
return true;
}

public static function close() {
self::$_mysqli->close();
return true;
}

public static function read($sid) {
$_query = "SELECT sdata FROM session WHERE sid='{$sid}' LIMIT 1";
$_result = self::$_mysqli->query($_query);
$_sdata = $_result->fetch_object();
return $_sdata->sdata;
}

public static function write($sid,$sdata) {
$_query = "SELECT sid FROM session WHERE sid='{$sid}' LIMIT 1";
$_result = self::$_mysqli->query($_query);
if (!!$_sid = $_result->fetch_object()) {
$_query = "UPDATE session SET sdata='{$sdata}' WHERE sid='{$sid}'";
self::$_mysqli->query($_query);
} else {
$_query = "INSERT INTO session (sid,sdata) VALUES ('{$sid}','{$sdata}')";
self::$_mysqli->query($_query);
}
return true;
}

public static function destroy($sid) {
$_query = "DELETE FROM session WHERE sid='{$sid}' LIMIT 1";
self::$_mysqli->query($_query);
setCookie(ini_get('session.name'),'',time()-1);
return true;
}

public static function gc($maxlifetime) {
$_query = "DELETE FROM session WHERE NOW()-slasttime>'{$maxlifetime}'";
self::$_mysqli->query($_query);
return true;
}
}

session::action();