ecshop的session传值

<?php
class cls_session
{
var $session_table = '';
var $max_life_time = 1440; // SESSION 过期时间
var $session_name = '';
var $session_id = '';
var $session_expiry = '';
var $session_md5 = '';
var $_time = 0;
function __construct($session_table,$session_name){
$this->cls_session($session_table,$session_name);
}
function cls_session($session_table,$session_name){
$GLOBALS['_SESSION'] = array();
$this->session_name = $session_name;
$this->session_table = $session_table;
if (!empty($_COOKIE[$this->session_name])){
$this->session_id = $_COOKIE[$this->session_name];
}
else{
$this->session_id = '';
}
$this->_time = time();
if ($this->session_id){
$this->load_session();
}
else{
$this->gen_session_id();
setcookie($this->session_name, $this->session_id);
}
register_shutdown_function(array($this, 'update_session'));
}
function gen_session_id(){
$this->session_id = md5(uniqid(mt_rand(), true));
return $this->insert_session();
}
function insert_session(){
return mysql_query('INSERT INTO ' . $this->session_table . " (sesskey, expiry,data) VALUES ('" . $this->session_id . "', ". $this->_time .",'a:0:{}')");
}
function load_session(){
$result = mysql_query('SELECT data, expiry FROM ' . $this->session_table . " WHERE sesskey = '" . $this->session_id . "'");
$session = mysql_fetch_array($result);
if (!empty($session['data']) && $this->_time - $session['expiry'] <= $this->max_life_time){
/***********************************************
* unserialize()还原已经序列化的SESSION变量 *
* 保证了SESSION变量的页面间传值的作用 *
***********************************************/
$GLOBALS['_SESSION'] = unserialize($session['data']);
}
}
function update_session(){
$adminid = !empty($GLOBALS['_SESSION']['admin_id']) ? intval($GLOBALS['_SESSION']['admin_id']) : 0;
$userid = !empty($GLOBALS['_SESSION']['user_id']) ? intval($GLOBALS['_SESSION']['user_id']) : 0;
/************************************************************************
* 用serialize函数将所有你所赋值的SESSION变量转化为一个序列化的字符串。 *
* SESSION本质不会发生变换,存入数据库中，用于下次调用。 *
************************************************************************/
$data = serialize($GLOBALS['_SESSION']);
$this->_time = time();
return mysql_query('UPDATE ' . $this->session_table . " SET expiry = " . $this->_time . ", userid = '" . $userid . "', adminid = '" . $adminid . "', data = '$data' WHERE sesskey = '" . $this->session_id . "'");
}
}
// database host
$db_host = "localhost";
// database name
$db_name = "ecshop";
// database username
$db_user = "root";
// database password
$db_pass = "dingran";
$link = mysql_connect($db_host, $db_user, $db_pass);
if ($link){
mysql_select_db($db_name);
}
else{
exit('mysql connection error:'.mysql_error());
}
/* 初始化session */
$sess = new cls_session('ecs_sessions','ECSCP_ID');
/* 验证session */
if (!isset($_SESSION['admin_id'])){
$_SESSION['admin_id'] = 9900099;
header("Location: e.php"); //在e.php再加载一次cls_session类,输出session变量
}
?>