CI框架session

用到的基本东西：

1.修改配置文件
config.php
$config['encryption_key']
2.加载session类
$this->load->library('session');
3.创建session
$this->session->set_userdata($array);
4.查看session
$this->session->userdata('session名');
5.删除session
$this->session->unset_userdata('session名');

例子：

views/login.php

<html>
<center><h1>用户登录页面</h1></center>
<form action="/ci/index.php/login/checklogin" method="post">
<center>
<ul style="list-style:none">
<li>用户名</li>
<li><input name="uname" type="text" /></li>
<li>密码</li>
<li><input name="upass" type="password" /></li>
<li><input name="sub" type="submit" value="提交" /></li>
</ul>
</center>
</form>
</html>

models/test_m.php

<?php
class Test_m extends CI_Model
{
	function __construct()
	{
		parent::__construct();
		$this->load->database();
	}

	
	function user_select($uname)
	{
		$this->db->where('uname',$uname);
		$this->db->select('*');
		$query=$this->db->get('user');
		//var_dump($query->result());die;
		return $query->result();
	}
}
?>

controllers/login.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Login extends CI_Controller {

function index()
	{
$this->load->view("login");

}
function checklogin()
	{
$this->load->model("test_m");
$user=$this->test_m->user_select($_POST['uname']);
if($user)
		{
if($user[0]->upass==$_POST['upass'])
			{

echo "密码正确";
$this->load->library('session');
$arr=array('uid'=>$user[0]->uid);
$this->session->set_userdata($arr);
echo $this->session->userdata('uid');
}else
			{
echo "密码错误";
}
}else
		{
echo "用户不存在";
}
}
function checksession()
	{
$this->load->library('session');
if($this->session->userdata('uid'))
		{
echo "已经登录";
}else
		{
echo "没登录";
}
}
function logout()
	{
	$this->load->library('session');
$this->session->unset_userdata('uid');
}

}
?>

哎，代码乱的无法直视啊

=>array数组的键和值
->对象的成员