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php数据加锁redis php redis锁

IT技术数据

php怎么将数据导入redis对于大访问量的站点使用默认的Session 并不合适 ， 我们可以将其存入数据库、或者使用Redis KEY-VALUE数据存储方案
首先新建一个session表
CREATE TABLE `sessions` (
`sid` char(40) NOT NULL,
`updatetime` int(20) NOT NULL,
`data` varchar(200) NOT NULL,
UNIQUE KEY `sid` (`sid`) USING HASH
) ENGINE=MEMORY DEFAULT CHARSET=utf8;
Mysql 的memory引擎采用内存表，所有数据存储在内存 ， 操作速度快
复制代码
?php
//引入数据库文件
include "db.php";
class MySessionHandler implements SessionHandlerInterface
{
private $savePath;
private $sessData;
public $expiretime;//设置过期时间
public $db;//数据库
public function __construct($hanlder =''){
【php数据加锁redis php redis锁】$this-db = Database::getInstance();
//获取数据库实力
///var_dump($this-db);
}
public function open($savePath, $sessionName)
{
return true;
}
public function close()
{
return true;
}
public function read($id)
{
$sql ="select * from sessions where sid ='$id'";
$result = $this-db-execute($sql);
if(!empty($result)){
return $this-sessData = https://www.04ip.com/post/$result;
}
}
//函数的参数 $id - 当前会话ID
//数据DATA - 序列化之后的字符串
public function write($id, $data)
{
// echo $id;
// echo $data;
$now = time();
$newExp = $now+$this-expiretime;//总时间=当前时间 + 期限时间
$sql = "select * from sessions where sid ='$id'";
$result = $this-db-getOne($sql);
//var_dump($result);
if($datahttps://www.04ip.com/post/==''||isset($data)){
$data = https://www.04ip.com/post/$this-sessData;
}
if($result){
//如果存在则更新
$sql ="update sessions set updatetime = '$newExp',data ='https://www.04ip.com/post/$data' where sid = '$id'";
//echo $sql;
$update_data =https://www.04ip.com/post/$this-db-execute($sql);
if($update_data){
return true;
}
}else{
//不存在则生成生成
$sql = "insert into sessions(sid,updatetime,data) values('$id','$now','$data')";
$insert_data = https://www.04ip.com/post/$this-db-execute($sql);
if($insert_data){
return true;
}
}
return false;
}
public function destroy($id)
{//销毁
$sql = "delete from sessions where sid="."$id";
$destory = $this-db-execute($sql);
if($destory){
return true;
}else{
return false;
}
}
public function gc($sessMaxLifeTime)
{
$t = time();
$sql ="delete from sessions where $t - 'updatetime'${sessMaxLifeTime}";
$data = https://www.04ip.com/post/$this-db-execute($this-tosql);
if($data){
return true;
}else{
return false;
}
return true;
}
}
复制代码
实例化
此处 PHP 手册可以有两种方法
1 ， 实现了SessionHandlerInterface借口的对象,自PHP5.4可以使用
2 ，直接使用session_set_save_handler
复制代码
//判断PHP版本
if(version_compare(PHP_VERSION,5.4)==1){
session_set_save_handler($handler, true);
session_start();
}else{
ini_set('session.use_trans_sid',0);
ini_set('session.use_cookies',1);
ini_set('session.cookie_path','/');
ini_set('session.save_handler','user');
session_module_name('user');
session_set_save_handler(array($session,"open"),array($session,"close"),array($session,"read"),array($session,"write"),array($session,"destory"),array($session,"gc"));
session_start();
}
$_SESSION['QQ']="QQ";
echo $_SESSION['QQ'];

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