serialize()和$ _SESSION

Question

用户通过身份验证后,我将类对象序列化并将其存储在会话中.但是,即使在使用unserialize()之后,我似乎无法打印其输出.

创建会话变量:

if(!isset($_SESSION['myObj']) && empty($_SESSION['myObj'])) {
$myObj = new User($row['user_id'], $row['username'], $row['user_level']);
$_SESSION['username']= $myObj->usr_name;
$s_Obj = serialize($myObj);
$_SESSION['myObj'] = $s_Obj;

从不同的页面访问,没有输出:

$sObj = $_SESSION['Obj'];
$myObj = unserialize($s_Obj);
echo $myObj->usr_name;

然而,这是有效的,所以我的班级没有任何问题.我也在session_start()两个页面中使用.

echo $_SESSION['username'];

班级用户:

<?php 

class User{
    public $usr_id;
    public $usr_name;
    public $usr_level;
    public $last_access_login;

    public function __construct($id, $usr_name, $usr_level) {
        $this->usr_id = $id;
        $this->usr_name = $usr_name;
        $this->usr_level = $usr_level;
        $this->last_access_login = date("F d Y H:i:s.",time());
  }
}
?>

编辑:

这是我的vardump

array
  'myObj' => 
    object(__PHP_Incomplete_Class)[1]
      public '__PHP_Incomplete_Class_Name' => string 'User' (length=4)
      public 'usr_id' => string '3' (length=1)
      public 'usr_name' => string 'student' (length=7)
      public 'usr_level' => string '3' (length=1)
      public 'last_access_login' => string 'November 26 2011 20:12:38.' (length=26)
  'url' => string '/researchportal/proposal' (length=24)

Answer 1

初始页面:

$s_Obj = serialize($myObj);
$_SESSION['myObj'] = $s_Obj;

应该

$_SESSION['myObj'] = $myObj;

下一页:

$sObj = $_SESSION['Obj'];
$myObj = unserialize($s_Obj);

应该

$myObj = $_SESSION['myObj'];

另外,在打电话之前尝试宣布你的课程session_start().