预先加载数据库操作类和Session类
即在autoload.php中:$autoload[‘libraries’] = array(‘database’, ‘session’);
a. 注: 使用session , 要设定 encryption key :
config.php中: $config[‘encryption_key’] = ‘!@#$%^&*()’;
登录表单页(view) : login_view.php
注: 由于该页面使用了CI的form标签, 所以需要在渲染该页面前加载form_helper, 即: 在config/autoload.php, 文件中加入: $autoload[‘helper’] = array(‘url’, ‘form’);
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang="utf-8">
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<title>Login</title>
<style>div{display: block;} .errors{color: red;}</style>
</head>
<body>
<h1>Please Login</h1>
<?php echo form_open('admin');?>
<p>
<?php
echo form_label('Email: ', 'email');
echo form_input('email', set_value('email'), 'id="email" autofocus'); // set_value 如果密码输入有误, 返回时,默认写入值
?>
</p>
<p>
<?php
echo form_label('Password: ', 'password');
echo form_input('password', '', 'id="password"');
?>
</p>
<p>
<?php echo form_submit('submit','Login');?>
</p>
<?php echo form_close();?>
<div class="errors"><?php echo validation_errors();?></div>
</body>
</html>
控制器 : admin.php
<?php
if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Admin extends CI_Controller {
function __construct(){
parent::__construct();
}
public function index(){
// 在welcome的action中添加如下代码,即可用户登录情况
/**
* public function __costruct(){
* session_start();
* parent::_construct();
*
* if(!$this->session->userdata('username')) redirect('admin');
* }
*/
if ($this->session->userdata('username')) {
redirect('welcome');
}
$this->load->library('form_validation'); // 使用CI的表单验证, 如下:
$this->form_validation->set_rules('email', 'Email', 'valid_email|required');
$this->form_validation->set_rules('password', 'Password', 'min_length[4]|required');
if($this->form_validation->run() !== false){
// then validate password. Get from the Db.
$this->load->model('admin_model');
$res = $this->admin_model->verify_users(
$this->input->post('email'),
$this->input->post('password')
);
if($res !== false){
print_r($res);
$this->session->set_userdata('username', $this->input->post('email'));
redirect('welcome');
}
}
$this->load->view('login_view');
}
public function logout(){
$this->session->sess_destroy();
$this->load->view('login_view');
}
}
模型层admin_model.php
<?php
class Admin_model extends CI_Model{
function verify_users($email, $password){
$q = $this->db
->where('email', $email)
->where('password', sha1($password))
->limit(1)->get('users');
if($q->num_rows > 0){
return $q->row();
}
return false;
}
}