CREATE TABLE `db_session` (`sesskey` char(32) NOT NULL,`expiry` int(11) unsigned NOT NULL,`value` text NOT NULL,PRIMARY KEY   (`sesskey`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

<?php$gb_DBname="db_myBBS";//数据库名称$gb_DBuser="root";//数据库用户名称$gb_DBpass="23928484";//数据库密码$gb_DBHOSTname="localhost";//主机的名称或是IP地址$SESS_DBH="";$SESS_LIFE=get_cfg_var("session.gc_maxlifetime");//得到session的最大有效期。function sess_open($save_path,$session_name){global $gb_DBHOSTname,$gb_DBname,$gb_DBuser,$gb_DBpass,$SESS_DBH;if(!$SESS_DBH=mysql_pconnect($gb_DBHOSTname,$gb_DBuser,$gb_DBpass)){echo "<li>MySql Error:".mysql_error()."<li>";die();}if(!mysql_select_db($gb_DBname,$SESS_DBH)){echo "<li>MySql Error:".mysql_error()."<li>";die();}return true;}function sess_close(){return true;}function sess_read($key){global $SESS_DBH,$SESS_LIFE;$qry="select value from db_session where sesskey = '$key' and expiry > ".time();$qid=mysql_query($qry,$SESS_DBH);if(list($value)=mysql_fetch_row($qid)){return $value;}return false;}function sess_write($key,$val){global $SESS_DBH,$SESS_LIFE;$expiry=time()+$SESS_LIFE;$value=$val;$qry="insert into db_session values('$key',$expiry,'$value')";$qid=mysql_query($qry,$SESS_DBH);if(!$qid){$qry="update db_session set expiry=$expiry, value='$value' where sesskey='$key' and expiry >".time();$qid=mysql_query($qry,$SESS_DBH);}return $qid;}function sess_destroy($key){global $SESS_DBH;$qry="delete from db_session where sesskey = '$key'";$qid=mysql_query($qry,$SESS_DBH);return $qid;}function sess_gc($maxlifetime){global $SESS_DBH;$qry="delete from db_session where expiry < ".time();$qid=mysql_query($qry,$SESS_DBH);return mysql_affected_rows($SESS_DBH);}session_module_name();session_set_save_handler("sess_open","sess_close","sess_read","sess_write","sess_destroy","sess_gc");
?>

<?php
include ("session_mysql.php");
session_start();
$_SESSION['abc']= "A: I will be back!";
$_SESSION['meto']= "B: Me too ";
$_SESSION['name']= "louis ";
echo "<a href=\"get_session_test.php\">click me</a>";
?>get_session_test.php
<?php
include ("session_mysql.php");
session_start();
echo $_SESSION['abc'];
echo "<br>";
echo $_SESSION['meto'];
echo "<br>";
echo $_SESSION['name'];
$_SESSION['wq']="12e";
echo "<br><a href=\"get_session_test2.php\">click again</a>";
?>get_session_test2.php
<?php
include ("session_mysql.php");
session_start();
echo $_SESSION['abc'];
echo "<br>";
echo $_SESSION['meto'];
echo "<br>";
echo $_SESSION['name'];
echo "<br>";
echo $_SESSION['wq'];
//session_destroy();//用来销毁所有session的函数。
?>