Codeigniter注册登录代码示例

class Login extends CI_Controller {
private $pass = '';
public function __construct() {
parent::__construct ();
$this->load->helper ( array (
'form',
'url'
) );
$this->load->library('session');
}
public function index() {
$this->load->view ( 'login' );
}
public function formsubmit() {
$this->load->library ( 'form_validation' ); $this->form_validation->set_rules ( 'username','Username','required' );
$this->form_validation->set_rules ( 'password','Password','required' );
if ($this->form_validation->run () == FALSE) {
$this->load->view ( 'login' );
} else {
if (isset ( $_POST ['submit'] ) && ! empty ( $_POST ['submit'] )) {
$data = array (
'user' => $_POST ['username'],
'pass' => md5($_POST ['password'])
);
$newdata = array(
'username' => $data ['user'],
'userip' => $_SERVER['REMOTE_ADDR'],
'luptime' =>time()
);
if ($_POST ['submit'] == 'login') {
$query = $this->db->get_where ( 'uc_user',array (
'user' => $data ['user']
),1,0 ); foreach ( $query->result () as $row ) {
$pass = $row->pass;
}
if ($pass == $data ['pass']) { $this->session->set_userdata($newdata);
$this->load->view ( 'usercenter',$data );
}
} else if ($_POST ['submit'] == 'register') { $this->session->set_userdata($newdata);
$this->db->insert ( 'uc_user',$data );
$this->load->view ( 'usercenter',$data );
} else {
$this->session->sess_destroy();
$this->load->view ( 'login' );
}
}
}
}
}

`id` int(11) unsigned zerofill NOT NULL AUTO_INCREMENT,
`user` varchar(20) NOT NULL,
`pass` char(32) NOT NULL,
`role` enum('root','normal') NOT NULL DEFAULT 'root',
`del` decimal(1,0) NOT NULL DEFAULT '0',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=latin1