SESSION存放在数据库用法实例
发布时间：2020-05-23 20:19:59 所属栏目：PHP 来源：互联网
导读：这篇文章主要介绍了SESSION存放在数据库用法,自定义了一个简单的针对数据操作的session类并给出了使用该类存储到数据库的相关技巧,需要的朋友可以参考下
|
本文实例讲述了SESSION存放在数据库用法。分享给大家供大家参考。具体如下： lifeTime = get_cfg_var("session.gc_maxlifetime"); // open database-connection $dbHandle = @mysql_connect("localhost","root",""); $dbSel = @mysql_select_db("test",$dbHandle); // return success if(!$dbHandle || !$dbSel) return false; $this->dbHandle = $dbHandle; return true; } function close() { $this->gc(ini_get('session.gc_maxlifetime')); // close database-connection return @mysql_close($this->dbHandle); } function read($sessID) { // fetch session-data $res = mysql_query("SELECT session_data AS d FROM ws_sessions WHERE session_id = '$sessID' AND session_expires > ".time(),$this->dbHandle); // return data or an empty string at failure if($row = mysql_fetch_assoc($res)) return $row['d']; return ""; } function write($sessID,$sessData) { // new session-expire-time $newExp = time() + $this->lifeTime; // is a session with this id in the database? $res = mysql_query("SELECT * FROM ws_sessions WHERE session_id = '$sessID'",$this->dbHandle); // if yes,if(mysql_num_rows($res)) { // ...update session-data mysql_query("UPDATE ws_sessions SET session_expires = '$newExp',session_data = '$sessData' WHERE session_id = '$sessID'",$this->dbHandle); // if something happened,return true if(mysql_affected_rows($this->dbHandle)) return true; } // if no session-data was found,else { // create a new row mysql_query("INSERT INTO ws_sessions ( session_id,session_expires,session_data) VALUES( '$sessID','$newExp','$sessData')",$this->dbHandle); // if row was created,return true if(mysql_affected_rows($this->dbHandle)) return true; } // an unknown error occured return false; } function destroy($sessID) { // delete session-data mysql_query("DELETE FROM ws_sessions WHERE session_id = '$sessID'",$this->dbHandle); // if session was deleted,return true,if(mysql_affected_rows($this->dbHandle)) return true; // ...else return false return false; } function gc($sessMaxLifeTime) { // delete old sessions mysql_query("DELETE FROM ws_sessions WHERE session_expires < ".time(),$this->dbHandle); // return affected rows return mysql_affected_rows($this->dbHandle); } } $session = new session(); session_set_save_handler(array(&$session,"open"),array(&$session,"close"),"read"),"write"),"destroy"),"gc")); session_start(); // etc... ?>希望本文所述对大家的php程序设计有所帮助。 （编辑：安卓应用网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |