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