The database stores session information code and stores session code_PHP tutorial

The database stores session information code, stores session code

Today I will give you a piece of code, The database stores session information, you only need to add the following code Just put it in the session file, and then import the sessiong file where session_start() is. Of course, you don’t need to write session_start() anymore

This is the structure of the database table

Okay, here’s the code

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();

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