預先加載數據庫操做類和Session類 即在autoload.php中,$autoload['libraries'] = array('database', 'session'); a. 注: 使用session , 要設定 encryption key : config.php中: $config['encryption_key'] = '!@#$%^&*()';
登陸表單頁(view) : login_view.php
注: 因爲該頁面使用了CI的form標籤, 因此須要在渲染該頁面前加載form_helper, 即: 在config/autoload.php, 文件中加入: $autoload['helper'] = array('url', 'form');
Html代碼
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html lang="utf-8">
- <head>
- <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
- <title>Login</title>
- <style>div{display: block;} .errors{color: red;}</style>
- </head>
- <body>
- <h1>Please Login</h1>
- <?php echo form_open('admin');?>
- <p>
- <?php
- echo form_label('Email: ', 'email');
- echo form_input('email', set_value('email'), 'id="email" autofocus'); // set_value 若是密碼輸入有誤, 返回時,默認寫入值
- ?>
- </p>
- <p>
- <?php
- echo form_label('Password: ', 'password');
- echo form_input('password', '', 'id="password"');
- ?>
- </p>
- <p>
- <?php echo form_submit('submit','Login');?>
- </p>
- <?php echo form_close();?>
-
- <div class="errors"><?php echo validation_errors();?></div>
- </body>
-
- </html>
控制器 : admin.php
Php代碼
- <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
-
- class Admin extends CI_Controller {
-
- function __construct(){
- parent::__construct();
- }
-
- public function index(){
-
- // 在welcome的action中添加以下代碼,便可用戶登陸狀況
- /**
- * public function __costruct(){
- * session_start();
- * parent::_construct();
- *
- * if(!$this->session->userdata('username')) redirect('admin');
- * }
- */
- if ($this->session->userdata('username')) {
- redirect('welcome');
- }
-
- $this->load->library('form_validation'); // 使用CI的表單驗證, 以下:
- $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');
- }
-
- }
模型層admin_model.php
注: 因爲使用了數據庫, 在這裏必須首先加載數據庫鏈接: 即: 在config/autoload.php, 文件中加入: $autoload['libraries'] = array('database');
Php代碼
- <?php
-
- class Admin_model extends CI_Model{
-
- function verify_users($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;
- }
- }
[/list]